One of the extra challenges this week was to take a previous sketch and flip it, so here's a different take on #13.
The red background is one of the small decorative stamps from RP, stamped end to end to create a linograph background. It was looking a little plain with just the RR, so I sponged on some CC and it really jazzed it up. Holly leaves from RP are stamped below that in GG, and the tree is popped up.