#vertex positions
v 0 0 0
v 2 0 0
v 2 0 2
v 0 0 2
v 0 2 0
v 2 2 0
v 2 2 2
v 0 2 2

f 1 2 3 4
f 8 7 6 5
f 2 6 7 3
f 1 5 6 2
f 3 7 8 4
f 4 8 5 1