Cavalli & Carrozza (2008) a MOC by Alessandro Cadei
http://www.brickshelf.com/cgi-bin/gallery.cgi?f=355146
The walk of the horses is inspired to the Theo Jansen's mechanism.
The two horses have a touch sensor in their head, so they can avoid obstacle.
A light sensor under the chariot can be used to intercept lines.
(1x RCX + 2x Touch sensors + 1x Light sensor + 3x Motors)