Each species is drawn as a chain of rigid segments — skull, jaw, spine, ribcage, legs and a tapering tail — pinned together at joints, the same "kinematic rig" approach real animation and robotics software uses to move an articulated body.
A single clock phase drives the whole walk cycle: opposite legs swing with a half-cycle offset so the animal never has all its feet moving at once, the spine bobs at twice the stride frequency (one bob per footfall), and the tail counter-sways to balance the swinging hips — exactly how large bipeds and quadrupeds keep their center of mass over their base of support while moving.
- Tyrannosaurus — bipedal, tiny counterbalancing arms, a stiff horizontal tail offsetting its heavy skull.
- Triceratops — quadrupedal, a wide frilled skull with brow and nose horns, four evenly-loaded legs.
- Stegosaurus — quadrupedal, a row of back plates and a spike-tipped tail (thagomizer) that swings for defense.