Area = b12 / Screen = 4x4
  1x1   1x2   2x2   3x3   Now
AREA_a11 AREA_a12 AREA_a13 AREA_a14
AREA_b11 AREA_b12 AREA_b13 AREA_b14
AREA_c11 AREA_c12 AREA_c13 AREA_c14
AREA_d11 AREA_d12 AREA_d13 AREA_d14