Welcome to project 2 of the Breaking Scratch series! This time, we're breaking costumes. Broken things to look at: 1. The red square's size can be set to 0. As you can see with the blue square, this should be impossible. (Unfortunately, I couldn't get the size higher than the max though.) And, in addition to that, the red square is still visible! 2. Go into the costumes of the red square. First of, try dragging the large costume so that not the whole costume making screen is covered. It might take a while! 3. Once again, go into the costumes of the red square. Now, go to the small costume. There is something there, I promise! One way you can tell is that when the small costume is selected, you can see in the sprites area that the sprite has a visible icon, a red circle. Another way is to select the mouse tool in the editor and drag a square over the centre with it. When you let go, you will be able to see that there is indeed something there! 4. Play around with the size of sprite 3.
I literally crashed scratch making this! Never had that happen before.