Area = b8 / Screen = 4x4
  1x1   1x2   2x2   3x3   Now
AREA_a7 AREA_a8 AREA_a9 AREA_a10
AREA_b7 AREA_b8 AREA_b9 AREA_b10
AREA_c7 AREA_c8 AREA_c9 AREA_c10
AREA_d7 AREA_d8 AREA_d9 AREA_d10