To use: 1. First press the "setup" button 2. Select "draw" and the draw a landscape, perhaps with a deep well in it. Deselect "draw" when you are done drawing. 3. Press "Reset balls" to start all balls at the top of the screen 4. Press "simulated-annealing" to start the balls moving with a lot of randomness. The randomness will decrease over time. If you want to quit the simulated annealing process at any time, simply click anywhere in the graphics display. 5. Did the balls all find the lowest spot of the landscape or did they get "stuck" somewhere?