When the green flag is clicked, the cat should move to the right 100 steps starting from the middle of the screen. When you click the green flag again, it should do the same thing, namely, start in the middle and move to the right 100 steps. But the cat does not start from the middle the next time you run it. What line of code is missing from this program so that the cat always starts in the middle every time the green flag is clicked?
