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First Create a Box And Fixate it the the Background
Then Create a Variable like Scene.my.var = 0 in the console
Then go to the text of the box in the script menu and type {"" + scene.my.var}
Then Increase the text scale accordingly. Then Pull Down the Console and Type Keys.bind{"a",{scene.my.var = scene.my.var + 1} and Press enter
Press A and see what happens to the 0 in the Box
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nice tutorial easy to understand and very use full.
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