Random Walk (left and right)
In this model the turtles engage in a "random walk." Each turtle walks forward one step at each clock tick. As they walk forward, they also take a step to the left or right. This movement is known as walking a square "lattice." A lattice is a set of points on the plane (or in space) that form a grid on which turtles walk.
Click on one of the pictures to see a quicktime movie of the model: