diff --git a/demo/cmd.txt b/demo/README.md
similarity index 62%
rename from demo/cmd.txt
rename to demo/README.md
index 10e5be4..51edf07 100644
--- a/demo/cmd.txt
+++ b/demo/README.md
@@ -1,3 +1,12 @@
+# demo
+
+## warning
+
+make sure image refed by [External-themes](https://github.com/ohmyzsh/ohmyzsh/wiki/External-themes) exist;
+
+## cmd
+
+``` shell
 # mkdir demo
 # cd demo
 # mkdir demo-git
@@ -15,4 +24,5 @@ echo git status prompt
 touch test.txt
 git st
 git add -A
-git ci -m "test"
\ No newline at end of file
+git ci -m "test"
+```