First, you (yellow cat) need to select a number between 1 and 10. The number will be added to the "Sum" variable. Then, the computer (green cat) will select a number between 1 and 10 too. And the number will also be added to the "Sum" variable. Repeat the process until you make the number is 100 or greater, and you win. But, if the computer manages to do it, you lose. Simple