How to make it click this button2 when it is on the screen?
Do you mean you want button2 to automatically click when on screen?
Yes. When it appears, it should be pressed automatically
If you don’t care about the press down / up animations, then you can just do this:
button2 is on screen → put your actions here
But if you want the button to animate, you’ll have to replace it with a normal sprite with animations and do it via events, since button sprites can only be clicked with a mouse / touch.