Study the behavior of this demo project and inspect the code to see why it does what it does! Eventually the grapes stop being produced. You must watch for quite some time for this to happen. Why does the production of grapes stop?

ASSIGNMENT:

Make the following changes:

1. Add a counter to keep track of how many grapes have been produced.
2. Instead of rectangles blocking the middle section of each side, put squares in the corners.
3. Add a sprite controlled by the user which can go around and erase raisons. Make sure it doesn't erase anything else.