▁block ▁designs ▁fit ▁into ▁a ▁" grid ," ▁the ▁number ▁of ▁squares ▁a ▁pattern ▁block ▁is ▁divided ▁into . ▁The ▁five ▁categories ▁into ▁which ▁most ▁square ▁patterns ▁fall ▁are ▁Four ▁P atch , ▁N ine ▁P atch , ▁Five - P atch , ▁Seven - P atch , ▁and ▁E ight - Point ed ▁Star . ▁Each ▁block ▁can ▁be ▁sub div ided ▁into ▁multi ples : ▁a ▁Four - P atch ▁can ▁be ▁constructed ▁of ▁ 1 6 ▁or ▁ 6 4 ▁squares , ▁for ▁example . ▁▁ ▁A ▁simple ▁N ine ▁P atch ▁is ▁made ▁by ▁se wing ▁five ▁pattern ed ▁or ▁dark ▁pieces ▁( patch es ) ▁to ▁four ▁light ▁square ▁pieces ▁in ▁altern ating ▁order . ▁These ▁nine ▁se wn ▁squares ▁make ▁one ▁block . ▁ ▁The ▁Sho o ▁Fly ▁var ies ▁from ▁this ▁N ine ▁P atch ▁by ▁div iding ▁each ▁of ▁the ▁four ▁corner ▁pieces ▁into ▁a ▁light ▁and ▁dark ▁triangle . ▁ ▁Another ▁variation ▁develop s ▁when ▁one ▁square ▁piece ▁is ▁divided ▁into ▁two ▁equal ▁rect angles ▁in ▁the ▁basic ▁N ine ▁P atch ▁design . ▁The ▁Ch urn ▁D ash ▁block ▁comb ines ▁the ▁tri angles ▁and ▁rectangle ▁to ▁expand ▁the ▁N ine ▁P atch . ▁ ▁The ▁Pra irie ▁Queen ▁block ▁comb ines ▁two ▁large ▁scale ▁tri angles ▁in ▁the ▁corner ▁section ▁with ▁the ▁middle ▁section ▁using ▁four ▁squares . ▁The ▁center ▁piece ▁is ▁one ▁full ▁size ▁square . ▁Each ▁of ▁the ▁nine ▁sections ▁does ▁have ▁the ▁same ▁overall ▁measurement ▁and ▁fits ▁together .