This is a response to Dbal's challenge to create a Scratch version of his Java game Infestation. See Forum topic http://scratch.mit.edu/forums/viewtopic.php?id=7104 Clicking on the Stage will send a Reproduce command to all living spiders. They will attempt to duplicate themselves, if they are not currently fighting. If there are not enough spiders left in the spider pool for them to reproduce themselves, they will wait until spiders become available. You can freeze the game if you click too many times in a row and exhaust the spider pool to the point where all spiders are trying to reproduce and no spiders are dying to replenish the spider pool. If this happens, Green Flag will reset the game. Each spider has the same exact scripts so if you think your computer can handle it, you can increase the spider pool by copying any of the spiders as many times as you like.