Scratch

Huh. That should work. Maybe just try changing it around, like change the format of it. Try it another way, like maybe with multiple scripts instead of just one. Sometimes that happens in Scratch, where a script doesn't work but it does in a different fashion 

One thing to be careful of is testing for exact matches, such as where you have Size = 100.  That kind of testing can fail, even when it looks like it should work, because of the way the computer stores numbers and the way it does calculations. 

A much safer method would be to say, instead, Size > 99.   Give that a try and see if it cures your problem.

By the way, computer languages that have typed data which is clearly integer, don't have this problem.   Scratch, however, doesn't have strongly typed data.

Paddle2See is correct. Scratch is very finicky in checking for exact values. Try using less than or greater than instead. (For example, <size > 99> rather than <size = 100>)