{HEAD ~ The other end} of upper arm 18 is connected to {TAIL ~ one part} 20a of a head joint 20 while the other part 20b of the head joint 20 is connected to a light element 22 
{ HEAD ~ The other end } of upper arm 18 is connected to { TAIL ~ one part } 20a of a head joint 20 while the other part 20b of the head joint 20 is connected to a light element 22
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH