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Scratch Variables
A simple way to think about variables is a box with numbers in it. These numbers can be increased and decreased and made to control various parts of a project.
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How are Variables made?
In the variables palette, click 
. A box will appear. Type the name of the wanted variable, and select whether it should be "for all sprites" (global) or "for this sprite only" (private). Press OK.
What can be done with Variables?
Variables have theoretically infinite uses. One of the most common is to simply store values — this only requires the Set () to () block and is not hard at all.