Area = a11 / Screen = 4x4
  1x1   1x2   2x2   3x3   Now
AREA_a10 AREA_a11 AREA_a12 AREA_a13
AREA_b10 AREA_b11 AREA_b12 AREA_b13
AREA_c10 AREA_c11 AREA_c12 AREA_c13