The dynamic display 2 or 3, wherein said means for providing relative movement between {TAIL ~ said plurality} of {HEAD ~ light sources} and said viewable layer comprises: 
The dynamic display 2 or 3 , wherein said means for providing relative movement between { TAIL ~ said plurality } of { HEAD ~ light sources } and said viewable layer comprises :
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH