| 
 | Simon |  | 
| 
 starting configuration. 
 | these worms are chains of segments. each joint has a fixed angular sinusoidal motion. the interactions between these small motions create an overall worm-like motion. 
 the tails of the worms are fixed in space. when the heads of two worms collide, the worm grows in length. | |
|   a moderately evolved form. | 
 a side view of another form. | |
| 
 a set of very long worms. |