Embodiments of the invention move objects throughout {HEAD ~ two dimensional space} by using {TAIL ~ a support line} that is coupled with both opposing sides of the platform 
by using
Embodiments of the invention move objects throughout { HEAD ~ two dimensional space } by using { TAIL ~ a support line } that is coupled with both opposing sides of the platform
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH