v 0.0 0.0 0.0
v 0.0 5.0 0.0
v 0.0 0.0 -50.0
v 0.0 5.0 -50.0

vt 0.0 0.0
vt 1.0 0.0
vt 0.0 1.0
vt 1.0 1.0

f 1/1 2/3 4/4 3/2