In this model there is one leader turtle and a group of follower turtles. The leader moves along a path according to a preselected formula (such as y = x^2). The followers move toward the leader with each step. The followers update their pursuit path each time the leader moves.

For detailed instructions on using the program, take a look at the info window from the Pursuit model.

Download the StarLogoT source code for the Pursuit model:
Download pursuit

To run this file you need StarLogoT2002 for the Macintosh.
(download StarLogoT)

Click on one of the pictures to see a quicktime movie of the model:
This movie shows four turtles following an invisible leader turtle. Try to guess the function the leader is following.
This movie shows four turtles following a visible leader turtle. The leader is tracing the same function he was following in the previous movie.