1x1=130x150 2x1=264x150 2x2=264x304 4x1=534x150 4x2=534x304 4x3=534x458 4x4=534x612 4x5=534x766 4x6=534x920 21x21=0x0 23x21=0x0 23x23=0x0 0x0=540x960 base=540x960