I made little cap sleeves and appliqued scrap pieces of red fabric in diamond shapes. I know that the sleeves should be slashed with an under layer pulled through. I could have done another cheat and slashed the sleeves then sewed red pieces in the holes. From a distance I think they look ok. It's a bit dodgy but it was for a costume.
I also made a quick cape from left over fabric. I didn't end up going to the party but it kept me amused that week and mum wore it to a different party.