This is a pretty standard 2-motor Beam walker.
It’s nervous system consists of 2 bicores in a
master-slave-configuration with reversible
coupling.
It has 2 tactile sensors at the front and 2 in
the front-legs.
If one of the front sensors is activated, the
robot reverses while slightly turning in the
opposit direction.
When both sensors are activated, it goes
into straight reverse with smaller steps.
The sensor in the right-front-leg makes the
robot turn slightly to the left and vice-versa.