Press the green flag and move your mouse around the screen. The color-changing cat will follow you! Chose the cat's size, color changing speed, transparency and much more with the 8 sliders. Press space to clear the screen.
I followed the instructions from a book called "coding PROJECTS IN SCRATCH" but added the 8 sliders. No, my capitol lock is not broken, that's the way the book writes it. Try setting "color change" to 100.