Each module having {HEAD ~ a one to one correspondence} with {TAIL ~ a bit} in a data array and comprising X columns and Y rows of pixels 
Each module having { HEAD ~ a one to one correspondence } with { TAIL ~ a bit } in a data array and comprising X columns and Y rows of pixels
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH