diff --git a/irotsuke.rb b/irotsuke.rb
old mode 100644
new mode 100755
index 9b473c0..4e2ea7b
--- a/irotsuke.rb
+++ b/irotsuke.rb
@@ -1,9 +1,9 @@
 #!/usr/bin/env ruby
 # -*- coding: utf-8 -*-
 
-??? aka
-  "???31m%s???m\n"
-???
+def aka
+  "\e[31m%s\e[m\n"
+end
 
 puts"赤いものを入力してください。"
 a = gets.chomp