Click the green flag to begin. There are 4 numbers to change. The first one outlined in green is the speed of the cat during the first part of the code. This can be changed from 1 to 10. The next three, out lined in blue, are the number of sides the shapes will have in the second part of the code. Click the plus or minus indicators next to the corresponding number. These can be changed from 3 to 10. The first number, the one right below the green one controls the first shape, which is in the top left, with the middle blue number controlling the middle shape and the last blue number controlling the last shape. Press "Space" to begin the program after all selections have been made. Press the green flag to restart the program.