I could help but what painting
I think the answer is 'purity' as it makes the most sense. Purity is represented by the color white, while green is either jealousy or happy/calming(rebirth). New ideas can be symbolized by green, as in a green flag or a green light.
put cameras around the school so you can see when someone's bullying (like live cameras) make signs from the art club that say not to bully and stuff and make a school where you have to interview the students before they can come in (why did they get kicked from their other school if that's what happened and such)
Answer:
I'd go with all of the above, but someone else may have a different answer
