Bet Sal x Larry fanfic

Sal and Larry make a bet while painting in Larry's room. Either Sal will have to hang an ugly painting at school or Larry has to do whatever Sal wants for half an hour. Where does it go next? My first fanfic. I will post it on AO3 too under my name Gextra. My plan was for this to be a oneshot but if I feel like it I m...