Vlinder02

do you think someone could achieve the flapping motion with a piece of pvc with wings on it inserted into another and pulling on strings like a puppet. I'm making a rise of the guardians baby tooth cosplay and i would like to have up and down movement as well as flapping. I've figured out how to move them up and down but i can't quite figure out how to rig it for the flapping. I don't have enough money or skills yet for motors, so i need to figure out how to do it with strings. I uploaded a pic of my design so far onto the account that i am currently posting on. Any help would be greatly appreciated!