diff --git a/dash-passion.zsh-theme b/dash-passion.zsh-theme
index d41c0c9..ee7cb48 100644
--- a/dash-passion.zsh-theme
+++ b/dash-passion.zsh-theme
@@ -1,64 +1,3 @@
-# gdate for macOS
-# REF: https://apple.stackexchange.com/questions/135742/time-in-milliseconds-since-epoch-in-the-terminal
-if [[ "$OSTYPE" == "darwin"* ]]; then
-    {
-        gdate
-    } || {
-        echo "\n$fg_bold[yellow]passsion.zsh-theme depends on cmd [gdate] to get current time in milliseconds$reset_color"
-        echo "$fg_bold[yellow][gdate] is not installed by default in macOS$reset_color"
-        echo "$fg_bold[yellow]to get [gdate] by running:$reset_color"
-        echo "$fg_bold[green]brew install coreutils;$reset_color";
-        echo "$fg_bold[yellow]\nREF: https://github.com/ChesterYue/ohmyzsh-theme-passion#macos\n$reset_color"
-    }
-fi
-
-
-# time
-function real_time() {
-    local color="%{$fg_no_bold[cyan]%}";                    # color in PROMPT need format in %{XXX%} which is not same with echo
-    local time="[$(date +%H:%M:%S)]";
-    local color_reset="%{$reset_color%}";
-    echo "${color}${time}${color_reset}";
-}
-
-# login_info
-function login_info() {
-    local color="%{$fg_no_bold[cyan]%}";                    # color in PROMPT need format in %{XXX%} which is not same with echo
-    local ip
-    if [[ "$OSTYPE" == "linux-gnu" ]]; then
-        # Linux
-        ip="$(ifconfig | grep ^eth1 -A 1 | grep -o '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}' | head -1)";
-    elif [[ "$OSTYPE" == "darwin"* ]]; then
-        # macOS
-        ip="$(ifconfig | grep ^en1 -A 4 | grep -o '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}' | head -1)";
-    elif [[ "$OSTYPE" == "cygwin" ]]; then
-        # POSIX compatibility layer and Linux environment emulation for Windows
-    elif [[ "$OSTYPE" == "msys" ]]; then
-        # Lightweight shell and GNU utilities compiled for Windows (part of MinGW)
-    elif [[ "$OSTYPE" == "win32" ]]; then
-        # I'm not sure this can happen.
-    elif [[ "$OSTYPE" == "freebsd"* ]]; then
-        # ...
-    else
-        # Unknown.
-    fi
-    local color_reset="%{$reset_color%}";
-    echo "${color}[%n@${ip}]${color_reset}";
-}
-
-
-# directory
-function directory() {
-    # local color="%{$fg_no_bold[cyan]%}";
-    local color="$FG[111]";
-    # REF: https://stackoverflow.com/questions/25944006/bash-current-working-directory-with-replacing-path-to-home-folder
-    local directory="${PWD/#$HOME/~}";
-    local color_reset="%{$reset_color%}";
-    echo "${color}[${directory}]${color_reset}";
-}
-
-
-# git
 ZSH_THEME_GIT_PROMPT_PREFIX="%{$fg_no_bold[blue]%}❮%{$fg_no_bold[red]%}";
 ZSH_THEME_GIT_PROMPT_SUFFIX="%{$reset_color%}";
 ZSH_THEME_GIT_PROMPT_END_SUFFIX="%{$fg_no_bold[blue]%}❯%{$reset_color%}";
@@ -76,11 +15,43 @@ ZSH_THEME_GIT_PROMPT_UNTRACKED="%{$fg_bold[red]%}⬢%{$reset_color%}"
 
 ZSH_THEME_GIT_PROMPT_UNMERGED="%{$fg_bold[red]%}!%{$reset_color%}"
 
+ZSH_THEME_GIT_FETCH_STATUS=0
+ZSH_THEME_GIT_FETCH_STATUS_INTERVAL=60
+
+function strf_real_time() {
+  local time_str;
+  local format=${1:='%Y-%m-%d {%u} %H:%M:%S'}
+  strftime -s time_str ${format} $EPOCHSECONDS
+  # strftime -s time_str "%Y-%m-%d {%u} %H:%M:%S" $EPOCHSECONDS
+  local time="[${time_str}]";
+  echo -e ${time}
+}
+
+# time
+function real_time() {
+  local color="%{$fg_no_bold[cyan]%}";                    # color in PROMPT need format in %{XXX%} which is not same with echo
+  # local time_str;
+  # strftime -s time_str "%Y-%m-%d {%u} %H:%M:%S" $EPOCHSECONDS
+  # local time="[${time_str}]";
+  local _time="$(strf_real_time '%H:%M:%S')"
+  local color_reset="%{$reset_color%}";
+  echo "${color}${_time}${color_reset}";
+}
+
+# directory
+function directory() {
+  # local color="%{$fg_no_bold[cyan]%}";
+  local color="$FG[111]";
+  # REF: https://stackoverflow.com/questions/25944006/bash-current-working-directory-with-replacing-path-to-home-folder
+  local directory="${PWD/#$HOME/~}";
+  local color_reset="%{$reset_color%}";
+  echo "${color}[${directory}]${color_reset}";
+}
 
 function __git_branch() {
   local ref
-  ref=$(command git symbolic-ref HEAD 2> /dev/null) || \
-  ref=$(command git rev-parse --short HEAD 2> /dev/null) || return
+  ref=$(__git_prompt_git symbolic-ref HEAD 2> /dev/null) || \
+  ref=$(__git_prompt_git rev-parse --short HEAD 2> /dev/null) || return
   echo "${ZSH_THEME_GIT_PROMPT_PREFIX}${ref#refs/heads/}${ZSH_THEME_GIT_PROMPT_SUFFIX}"
 }
 
@@ -91,55 +62,40 @@ function vscode_git_status() {
   # This cannot use the prompt constants, as they may be empty
   local -A prefix_constant_map
   prefix_constant_map=(
-    '\?\? '          'UNTRACKED'
-    '[MTARC][ MTD] '  'STAGED'
-    'D  '            'STAGED'
-    ' [AMTD] '       'UNSTAGED'
-    '[MTARC][MTD] '  'UNSTAGED'
-    '[DAU][DAU] '    'UNMERGED'
-    'ahead'          'AHEAD'
-    'behind'         'BEHIND'
-    'diverged'       'DIVERGED'
-    'stashed'        'STASHED'
+  '\?\? '          'UNTRACKED'
+  '[MTARC][ MTD] '  'STAGED'
+  'D  '            'STAGED'
+  ' [AMTD] '       'UNSTAGED'
+  '[MTARC][MTD] '  'UNSTAGED'
+  '[DAU][DAU] '    'UNMERGED'
+  'ahead'          'AHEAD'
+  'behind'         'BEHIND'
+  'diverged'       'DIVERGED'
+  'stashed'        'STASHED'
   )
 
-    # '(?![DAU][DAU])[MTARCD][AMTD ] '    'STAGED'  # exclude the `[DAU][DAU]`
-    # '(?![DAU][DAU])[MTARCD ][AMTD] '    'UNSTAGED'
-#   prefix_constant_map=(
-#     '\?\? '     'UNTRACKED'
-#     '[MTARC][MTD] '  'STAGEDUNSTAGED'
-#     '[MTARC]  '  'STAGED'
-#     'D  '       'STAGED'
-#     ' [AMD] '   'UNSTAGED'
-#     '[DAU][DAU] ' 'UNMERGED'
-#     'ahead'     'AHEAD'
-#     'behind'    'BEHIND'
-#     'diverged'  'DIVERGED'
-#     'stashed'   'STASHED'
-#   )
-
   # Maps the internal constant to the prompt theme
   local -A constant_prompt_map
   constant_prompt_map=(
-    'UNTRACKED'         "$ZSH_THEME_GIT_PROMPT_UNTRACKED"
-    'ADDED'             "$ZSH_THEME_GIT_PROMPT_ADDED"
-    'MODIFIED'          "$ZSH_THEME_GIT_PROMPT_MODIFIED"
-    'RENAMED'           "$ZSH_THEME_GIT_PROMPT_RENAMED"
-    'DELETED'           "$ZSH_THEME_GIT_PROMPT_DELETED"
-    'UNMERGED'          "$ZSH_THEME_GIT_PROMPT_UNMERGED"
-    'AHEAD'             "$(git_commits_ahead)"
-    'BEHIND'            "$(git_commits_behind)"
-    'DIVERGED'          "$ZSH_THEME_GIT_PROMPT_DIVERGED"
-    'STASHED'           "$ZSH_THEME_GIT_PROMPT_STASHED"
-    'STAGED'            "$ZSH_THEME_GIT_PROMPT_STAGED"
-    'UNSTAGED'          "$ZSH_THEME_GIT_PROMPT_UNSTAGED"
+  'UNTRACKED'         "$ZSH_THEME_GIT_PROMPT_UNTRACKED"
+  'ADDED'             "$ZSH_THEME_GIT_PROMPT_ADDED"
+  'MODIFIED'          "$ZSH_THEME_GIT_PROMPT_MODIFIED"
+  'RENAMED'           "$ZSH_THEME_GIT_PROMPT_RENAMED"
+  'DELETED'           "$ZSH_THEME_GIT_PROMPT_DELETED"
+  'UNMERGED'          "$ZSH_THEME_GIT_PROMPT_UNMERGED"
+  'AHEAD'             "$(git_commits_ahead)"
+  'BEHIND'            "$(git_commits_behind)"
+  'DIVERGED'          "$ZSH_THEME_GIT_PROMPT_DIVERGED"
+  'STASHED'           "$ZSH_THEME_GIT_PROMPT_STASHED"
+  'STAGED'            "$ZSH_THEME_GIT_PROMPT_STAGED"
+  'UNSTAGED'          "$ZSH_THEME_GIT_PROMPT_UNSTAGED"
   )
 
   # The order that the prompt displays should be added to the prompt
   local status_constants
   status_constants=(
-    UNTRACKED ADDED MODIFIED RENAMED DELETED
-    STASHED UNMERGED AHEAD BEHIND DIVERGED STAGED UNSTAGED
+  UNTRACKED ADDED MODIFIED RENAMED DELETED
+  STASHED UNMERGED AHEAD BEHIND DIVERGED STAGED UNSTAGED
   )
 
   local status_text
@@ -147,14 +103,14 @@ function vscode_git_status() {
 
   # Don't continue on a catastrophic failure
   if [[ $? -eq 128 ]]; then
-    return 1
+  return 1
   fi
 
   # A lookup table of each git status encountered
   local -A statuses_seen
 
   if __git_prompt_git rev-parse --verify refs/stash &>/dev/null; then
-    statuses_seen[STASHED]=1
+  statuses_seen[STASHED]=1
   fi
 
   local status_lines
@@ -162,80 +118,76 @@ function vscode_git_status() {
 
   # If the tracking line exists, get and parse it
   if [[ "$status_lines[1]" =~ "^## [^ ]+ \[(.*)\]" ]]; then
-    local branch_statuses
-    local match
-    local branch_status
-    branch_statuses=("${(@s/,/)match}")
-    for branch_status in $branch_statuses; do
-      if [[ ! $branch_status =~ "(behind|diverged|ahead) ([0-9]+)?" ]]; then
-        continue
-      fi
-      local last_parsed_status=$prefix_constant_map[$match[1]]
-      statuses_seen[$last_parsed_status]=$match[2]
-    done
+  local branch_statuses
+  branch_statuses=("${(@s/,/)match}")
+  for branch_status in $branch_statuses; do
+    if [[ ! $branch_status =~ "(behind|diverged|ahead) ([0-9]+)?" ]]; then
+    continue
+    fi
+    local last_parsed_status=$prefix_constant_map[$match[1]]
+    statuses_seen[$last_parsed_status]=$match[2]
+  done
   fi
 
-  local status_prefix
   # For each status prefix, do a regex comparison
   for status_prefix in ${(k)prefix_constant_map}; do
-    local status_constant="${prefix_constant_map[$status_prefix]}"
-    local status_regex=$'(^|\n)'"$status_prefix"
+  local status_constant="${prefix_constant_map[$status_prefix]}"
+  local status_regex=$'(^|\n)'"$status_prefix"
 
-    if [[ "$status_text" =~ $status_regex ]]; then
-      statuses_seen[$status_constant]=1
-    fi
+  if [[ "$status_text" =~ $status_regex ]]; then
+    statuses_seen[$status_constant]=1
+  fi
   done
 
   # Display the seen statuses in the order specified
   local status_prompt
   for status_constant in $status_constants; do
-    if (( ${+statuses_seen[$status_constant]} )); then
-      local next_display=$constant_prompt_map[$status_constant]
-      status_prompt="$next_display$status_prompt"
-    fi
+  if (( ${+statuses_seen[$status_constant]} )); then
+    local next_display=$constant_prompt_map[$status_constant]
+    status_prompt="$next_display$status_prompt"
+  fi
   done
 
   echo $status_prompt
 }
 
 function update_git_status() {
-    if __git_prompt_git rev-parse --git-dir &>/dev/null; then
-        GIT_STATUS=$(__git_branch);
-        local git_status="$(vscode_git_status)"
-        if [[ $git_status != "" ]]; then
-            GIT_STATUS+=" ${git_status}";
-        fi 
-        GIT_STATUS+=${ZSH_THEME_GIT_PROMPT_END_SUFFIX};
-    else
-        GIT_STATUS=""
-    fi
+  if __git_prompt_git rev-parse --git-dir &>/dev/null; then
+    GIT_STATUS=$(__git_branch);
+    local git_status="$(vscode_git_status)"
+    if [[ $git_status != "" ]]; then
+      GIT_STATUS+=" ${git_status}";
+    fi 
+    GIT_STATUS+=${ZSH_THEME_GIT_PROMPT_END_SUFFIX};
+  else
+    GIT_STATUS=""
+  fi
 }
 
 function git_status() {
-    update_git_status;
-    echo "${GIT_STATUS}"
+  update_git_status;
+  echo "${GIT_STATUS}"
 }
 
-
 # command
 function update_command_status() {
-    local arrow="";
-    local color_reset="%{$reset_color%}";
-    local reset_font="%{$fg_no_bold[white]%}";
-    COMMAND_RESULT=$1;
-    export COMMAND_RESULT=$COMMAND_RESULT
-    if $COMMAND_RESULT;
-    then
-        arrow="%{$fg_bold[red]%}❱%{$fg_bold[yellow]%}❱%{$fg_bold[green]%}❱";
-    else
-        arrow="%{$fg_bold[red]%}❱❱❱";
-    fi
-    COMMAND_STATUS="${arrow}${reset_font}${color_reset}";
+  local arrow="";
+  local color_reset="%{$reset_color%}";
+  local reset_font="%{$fg_no_bold[white]%}";
+  COMMAND_RESULT=$1;
+  export COMMAND_RESULT=$COMMAND_RESULT
+  if $COMMAND_RESULT;
+  then
+    arrow="%{$fg_bold[red]%}❱%{$fg_bold[yellow]%}❱%{$fg_bold[green]%}❱";
+  else
+    arrow="%{$fg_bold[red]%}❱❱❱";
+  fi
+  COMMAND_STATUS="${arrow}${reset_font}${color_reset}";
 }
 update_command_status true;
 
 function command_status() {
-    echo "${COMMAND_STATUS}"
+  echo "${COMMAND_STATUS}"
 }
 
 # settings
@@ -245,123 +197,140 @@ typeset +H my_orange="$FG[214]"
 
 # separator dashes size
 function afmagic_dashes {
-    local ratio=1
-    echo $((COLUMNS * ratio))
+  local ratio=1
+  echo $((COLUMNS * ratio))
 }
 
+current_time_millis() {
+  local time_millis;
+  time_millis=$EPOCHREALTIME
+  echo $time_millis;
+}
+
+
 # output command execute after
 output_command_execute_after() {
-    if [ "$COMMAND_TIME_BEIGIN" = "-20200325" ] || [ "$COMMAND_TIME_BEIGIN" = "" ];
-    then
-        return 1;
-    fi
+  if [ "$COMMAND_TIME_BEIGIN" = "-20200325" ] || [ "$COMMAND_TIME_BEIGIN" = "" ];
+  then
+    return 1;
+  fi
 
-    # cmd
-    local cmd="${$(fc -l | tail -1)#*  }";
-    local color_cmd="";
-    if $1;
-    then
-        color_cmd="$fg_no_bold[green]";
-    else
-        color_cmd="$fg_bold[red]";
-    fi
-    local color_reset="$reset_color";
-    cmd="${color_cmd}${cmd}${color_reset}"
+  # cmd
+  local cmd="${$(fc -l | tail -1)#*  }";
+  local color_cmd="";
+  if $1;
+  then
+    color_cmd="$fg_no_bold[green]";
+  else
+    color_cmd="$fg_bold[red]";
+  fi
+  local color_reset="$reset_color";
+  cmd="${color_cmd}${cmd}${color_reset}"
 
-    # time
-    local time="[$(date +%H:%M:%S)]"
-    local color_time="$fg_no_bold[cyan]";
-    time="${color_time}${time}${color_reset}";
+  # time
+  # you can use the real_time command to replace
+  local color_time="$fg_no_bold[cyan]";
+  local _time="${color_time}$(strf_real_time)${color_reset}";
 
-    # cost
-    local time_end="$(current_time_millis)";
-    local cost=$(bc -l <<<"${time_end}-${COMMAND_TIME_BEIGIN}");
-    COMMAND_TIME_BEIGIN="-20200325"
-    local length_cost=${#cost};
-    if [ "$length_cost" = "4" ];
-    then
-        cost="0${cost}"
-    fi
-    cost="[cost ${cost}s]"
-    local color_cost="$fg_no_bold[yellow]";
-    cost="${color_cost}${cost}${color_reset}";
+  # cost
+  local time_end="$(current_time_millis)";
+  local cost=$(bc -l <<<"${time_end}-${COMMAND_TIME_BEIGIN}");
+  COMMAND_TIME_BEIGIN="-20200325"
+  local length_cost=${#cost};
+  if [ "$length_cost" = "11" ]; # 11 means the length of cost
+  then
+    cost="0${cost}"
+  fi
+  cost="[cost ${cost}s]"
+  local color_cost="$fg_no_bold[yellow]";
+  cost="${color_cost}${cost}${color_reset}";
 
-    echo -e "${time} ${cost} ${cmd}";
-    echo -e "";
-    local echo_dark_gray="\033[2;49;39m"
+  echo -e "${_time} ${cost} ${cmd}";
 
-    echo -e "$echo_dark_gray${(l.$(afmagic_dashes)..-.)}${color_reset}"
+  echo -e "";
+  local echo_dark_gray="\033[2;49;39m"
+  echo -e "$echo_dark_gray${(l.$(afmagic_dashes)..-.)}${color_reset}"
 }
 
 
 # command execute before
 # REF: http://zsh.sourceforge.net/Doc/Release/Functions.html
 preexec() {
-    COMMAND_TIME_BEIGIN="$(current_time_millis)";
+  COMMAND_TIME_BEIGIN="$(current_time_millis)";
 }
 
-current_time_millis() {
-    local time_millis;
-    if [[ "$OSTYPE" == "linux-gnu" ]]; then
-        # Linux
-        time_millis="$(date +%s.%3N)";
-    elif [[ "$OSTYPE" == "darwin"* ]]; then
-        # macOS
-        time_millis="$(gdate +%s.%3N)";
-    elif [[ "$OSTYPE" == "cygwin" ]]; then
-        # POSIX compatibility layer and Linux environment emulation for Windows
-    elif [[ "$OSTYPE" == "msys" ]]; then
-        # Lightweight shell and GNU utilities compiled for Windows (part of MinGW)
-    elif [[ "$OSTYPE" == "win32" ]]; then
-        # I'm not sure this can happen.
-    elif [[ "$OSTYPE" == "freebsd"* ]]; then
-        # ...
-    else
-        # Unknown.
-    fi
-    echo $time_millis;
-}
-
-
 # command execute after
 # REF: http://zsh.sourceforge.net/Doc/Release/Functions.html
 dash_passion_precmd() {
-    # last_cmd
-    local last_cmd_return_code=$?;
-    local last_cmd_result=true;
-    if [ "$last_cmd_return_code" = "0" ];
-    then
-        last_cmd_result=true;
-    else
-        last_cmd_result=false;
-    fi
+  # last_cmd
+  local last_cmd_return_code=$?;
+  local last_cmd_result=true;
+  if [ "$last_cmd_return_code" = "0" ];
+  then
+    last_cmd_result=true;
+  else
+    last_cmd_result=false;
+  fi
 
-    # update_git_status
-    update_git_status
+  # update_git_status
+  update_git_status
 
-    # update_command_status
-    update_command_status $last_cmd_result;
+  # update_command_status
+  update_command_status $last_cmd_result;
 
-    # output command execute after
-    output_command_execute_after $last_cmd_result;
+  # output command execute after
+  output_command_execute_after $last_cmd_result;
 
 }
 
-TMOUT=1;
-
-TRAPALRM() {
-    # $(git_prompt_info) cost too much time which will raise stutters when inputting. so we need to disable it in this occurence.
-    # if [ "$WIDGET" != "expand-or-complete" ] && [ "$WIDGET" != "self-insert" ] && [ "$WIDGET" != "backward-delete-char" ]; then
-    # black list will not enum it completely. even some pipe broken will appear.
-    # so we just put a white list here.
-    if [ "$WIDGET" = "" ] || [ "$WIDGET" = "accept-line" ] ; then
-        zle reset-prompt;
-    fi
+function git_fetch_status() {
+  [ ${ZSH_THEME_GIT_FETCH_STATUS} != "0" ] && return 0
+  ZSH_THEME_GIT_FETCH_STATUS=1
+  __git_prompt_git rev-parse --is-inside-work-tree &>/dev/null || return 0
+  __git_prompt_git fetch -q --all 2>/dev/null
+  __git_prompt_git status 12>/dev/null
+  ZSH_THEME_GIT_FETCH_STATUS=0
 }
 
+function chpwd() {
+  __git_prompt_git rev-parse --is-inside-work-tree &>/dev/null || return 0
+  __git_prompt_git status 12>/dev/null
+}
+
+# real time clock for zsh.
+# https://stackoverflow.com/questions/2187829/constantly-updated-clock-in-zsh-prompt
+schedprompt() {
+  emulate -L zsh
+  zmodload -i zsh/sched
+
+  integer i=${"${(@)zsh_scheduled_events#*:*:}"[(I)git_fetch_status]}
+  # git_fetch_all periodically.
+  (( i )) || sched +${ZSH_THEME_GIT_FETCH_STATUS_INTERVAL} git_fetch_status
+
+  # Remove existing event, so that multiple calls to
+  # "schedprompt" work OK.  (You could put one in precmd to push
+  # the timer 30 seconds into the future, for example.)
+  integer i=${"${(@)zsh_scheduled_events#*:*:}"[(I)schedprompt]}
+  (( i )) && sched -$i
+
+  # Test that zle is running before calling the widget (recommended
+  # to avoid error messages).
+  # Otherwise it updates on entry to zle, so there's no loss.
+  if [ "$WIDGET" = "" ] || [ "$WIDGET" = "accept-line" ] ; then
+    zle && zle reset-prompt;
+  fi
+
+  # This ensures we're not too far off the start of the minute
+  # update zle for every second.
+  sched +1 schedprompt
+}
+
+zmodload -i zsh/datetime
+
 setopt prompt_subst
 PROMPT='$(real_time) $(directory) $(git_status) $(command_status) ';
 RPROMPT='%{$FG[242]%}%n@%m $(battery_pct_prompt)${color_reset}';
 
 autoload -Uz add-zsh-hook
-add-zsh-hook precmd dash_passion_precmd
\ No newline at end of file
+add-zsh-hook precmd dash_passion_precmd
+schedprompt