Definition col1 (sc : col_cubes) : colors := sc F1.
Definition col2 (sc : col_cubes) : colors := sc F2.
Definition col3 (sc : col_cubes) : colors := sc F3.
Definition col4 (sc : col_cubes) : colors := sc F4.
Definition col5 (sc : col_cubes) : colors := sc F5.

Lemma eqperm_map2 : forall p1 p2 : col_cubes,
(p1 == p2) = all (fun s => p1 s == p2 s) [:: F0; F1; F2; F3; F4; F5].