Inspired by someone else - so sorry I can't give you credit - but you had amazing instructions.
The idea was to tape off squares on the canvas and then to paint these sections dark colors (red, dark pink, etc). Then after they dry and the tape has been removed, to paint the whole canvas a lighter color. The darker squares will show through and offer some visual interest.
I used SCAL to cut Valentiney words in different fonts in red vinyl. Then after the paint was dry, I applied the words in a random fashion. The "10 reasons I love you" tag came in a K & Co paper stack. I added in reasons I love my husband.