g default
v -1 0 1
v -1 0 -1
v 1 0 -1
v 1 0 1
vt 0 0
vt 0 1
vt 1 1
vt 1 0
vn -0 1 0
vn -0 1 0
vn -0 1 0
vn -0 1 0
g default_0
f 3/3/3 2/2/2 1/1/1
f 4/4/4 3/3/3 1/1/1