[Katie Reynolds]

K, they use file cards/brushes found in the SPI catalog to move. There are three cards per row, two rows per side for a total of twelve cards on the robot. One row from each side is picked up and moved foreward while the remaining two stay in place. Then the other two are picked up and move foreward while the first two remain on the ground. ... sorry if the explanation is kind of confusing ... it's the best way I can think of to describe it!

- Katie