This is my sketch on canvas, toned with lighter colors than I normally use. My normal is red and burnt sienna. This time I added yellow ochre to the mix. I want the undercoat be bright since it's going to be in acrylic with linework.
I also sneaked in a roadrunner in the right-hand corner under the sunflower. Can you see him? Every balloon poster that I've seen has a roadrunner somewhere in the painting because it's our state bird. Now comes the hard part - actually painting the darn thing. Wish me luck.