Call a procedure when screen is opened or stop a procedure from happening twice

Okay, let's say that I'm in screen1 and once I open screen2, it will call this procedure. How do I do that? (Ignore the second question, I know how to do it now)

Can you explain in more detail

I changed the question to make it easier to understand now.

You Can Use (Initialize) Block like this :
blocks

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Do you mean, this block is on screen 1 ?
If this Block is on screen1 you cannot run it on screen 2

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Okay thanks!

:smiley: :+1: