hi...i am having this problem can u help me please

For future questions provide your source code and errors as text, not as images. After pasting your source, select it and use the 101/010 button to format it.

As for your error, you are using the Javascript/Unityscript version of RequireComponent. Line 3 should be:

   [RequireComponent (typeof (Kai))]

http://docs.unity3d.com/ScriptReference/RequireComponent.html