Color:

[2 in total] 1*2 holes 1*3 holes

[4 in total] 2*2 holes 2*3 holes

[8 in total] 4*2 holes 4*3 holes

[16 in total] 8*2 holes 8*3 holes

[32 in total] 16 * two holes 16 * three holes

[Upgrade with invisible handle 2 in total] 1*2 holes 1*3 holes

[Upgrade with invisible handle 4 in total] 2*2 holes 2*3 holes

[Upgrade with invisible handle 8 in total] 4*2 holes 4*3 holes

[Upgrade with invisible handle 16 in total] 8*2 holes 8*3 holes

[upgrade with invisible handle a total of 32] 16 * two holes 16 * three holes