Just click the green flag! Cats will pop up from either side and go across. Hope this will help you with your own projects. :D
I came up with this. It is the same principle as I used in creating the meteors' spawn in my Rocket Smiley. By the way, here's the address to Rocket Smiley, if you want to check it out: http://scratch.mit.edu/projects/19685495/ :D
