{
f0,1,2,3,-1,   'f means these faces remain as frames
f4,5,6,7,-1,
f0,1,5,4,-1, 
f1,2,6,5,-1,
f2,3,7,6,-1,
f3,0,4,7,-1,

rN0,2,5,-1,   'r colours these faces red
rN2,7,5,-1,   'N means these are non-regular faces
rN0,5,7,-1,
rN0,2,7,-1,
}