diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,2 +1,7 @@
 # C302
-302 redirect cgi for simple-http-server
+302 redirect cgi for [simple-http-server](https://github.com/fumiama/simple-http-server)
+
+## demo
+> show a random characher on each refresh
+
+![bocchi](https://cmoe.azurewebsites.net/c302?)