paint your room red - A mean way to tell someone they’re going to be so ashamed, t

A mean way to tell someone they’re going to be so ashamed, their whole room will look like it’s been covered in blood or tomato sauce.

Paint your room red and then come back here and apologize.

You're so ashamed, I'll make you paint your room red.

If you don’t stop talking nonsense, I’ll make you paint your room red.