How do I make a counting screen?

[Heisenraptor]

Hey guys, I would like to make a screen that adds 1 to a variable every 1 second but I'm having some problems.
Here's what I did:
I created "$ number = 0"
I created "$ number_max = 60" so the maximum "number" can count to is 60

Then I created a counting screen:
screen counting:
if number < number_max:
timer 1.0 repeat True action SetVariable("number", +1)

And it doesn't work, I think it may be SetVariable's fault but screens don't accept "$ number += 1".
Can anyone help me?
Thank you!

[kivik]

What about:

Code: Select all

global number # not sure if you need this
timer 1.0 repeat True action SetVariable("number", number+1)