Button problem (noob)

Hello mates

I have just starded plaing around with unity and I am just loving it.
Just encounderd my first problem where google diden’t help med and hope you guys can help me.
I have a button and I whant to be able to check and unchek this in game.
and happy holidays and sorry for bad english

(see Attachment)

[107973-code.txt|107973]

Use a Toggle.
https://docs.unity3d.com/Manual/script-Toggle.html