v -0.5 -0.5 0.5
v 0.5 -0.5 0.5
v 0.5 0.5 0.5
v -0.5 0.5 0.5
v -0.5 -0.5 -0.5
v 0.5 -0.5 -0.5
v 0.5 0.5 -0.5
v -0.5 0.5 -0.5

vn 0 0 1
vn 0 0 -1
vn 0 1 0
vn 0 -1 0
vn 1 0 0
vn -1 0 0

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