Once the greens had dried, I added the tiniest bit of red, brown, and black for a distressed look.
A large canvas painted in this way holds many possibilities. A happy list can be vague and universal or specific and personal. You can choose to be artistic or sincere (though one doesn't preclude the other). You could paint a favorite quote or themed words such as foreign cities, favorite foods (great kitchen decor), 'welcome' in numerous languages, names of family members, or favorite books or authors (great library decor).
Remember that canvases can be repainted when you tire of them, making an affordable decorating or craft project! An oversized canvas is a handy way to adorn a large wall on a not-so-large budget.