script errors

Can anyone help me please I new to unity I added some UI and then I tried to add script but I couldn’t .
I have these errors

How to report your problem productively in the Unity3D forums:

http://plbm.com/?p=220

How to understand errors in general:

If you post a code snippet, ALWAYS USE CODE TAGS:

How to use code tags: Using code tags properly

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Looking at that graphic looks like you’re using some preview 2D texture package. Try removing it, then reinstalling it only if you need it.

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what about this error?