I had originally thought we would pour paint ( for those who don't know what it is also called tall painting look it up. It is amazing ). Here is the version I think I will try. Thanks Dilly-Dally Art. But I decided I wanted the canvas completely covered and wasn't sure if my "M" was tall enough.
Paint the canvas the color of the background.
Tape down the shape you want.
(you could use painters tape)