#everything in ccw order
vertex -100 0 0
vertex 100 0 0 
vertex 100 0 100
vertex -100 0 100 

texcoord 0 0 
texcoord 1 0
texcoord 1 1
texcoord 0 1

face
vertices 0 1 2 3 
texcoords 0 1 2 3 
endface