Click on a color on the right side to choose it to paint with. The width of your brush can be changed by moving the slide on the bottom. It starts out pretty wide at size 30. You can choose a width between 5 and 99. You can erase all your work by clicking on "Start Over". And you may click on the eraser at any time to use it to erase part of your work. You have eight pictures to choose from including a blank so you can make your own creation.