Draw rectangles on the screen using the mouse. Press the start button. The dots will move in random directions.
They leave behind little trails which increase with each nearby dot. The dots will attempt to avoid the trails.
Sometimes they get stuck if there are too many dots near each other, because they just keep increasing the trail value to maximum. They should eventually find openings to get out though. They still move in random directions, but the trails encourage them to seek "unexplored" areas.
The dots turn blue when there is no "good" choice to make. The dot that is white (changes to gold) is the dot you can watch when you click "Toggle Choice Display".