Find or borrow some sort of projector or overhead projector. I bought the Tracer Jr. from Artograph.
Image from Artograph
It’s available at Michael’s and sells for $50. I used a coupon and got mine for $30. Tangent: It was obvious that someone else had used and returned the one that I bought and then taped the plastic shut again on the bottom. Don’t do that! Come borrow mine if you’re desperate, but let’s keep it honest.
First of all, let’s talk about the limitations of this projector. The size image you can project maxes out at about 3.5” X 3.5”. It’s really best if you can reduce your image to that size and then move the projector further away from the wall. Trying to project the image in sections (even after drawing an elaborate grid system) will make you curse. Because of the mirrors and stuff inside, you can’t just slide the projector over and have the image cooperate.
It also took me a bit to figure out that you didn’t turn the black part to focus…you slide it in or out. I’m sure none of you would have that issue, though. 
Are there nicer projectors out there? You bet. Was it worth $30? Absolutely.
So, I printed out a Utah Jazz logo and projected it onto the wall and traced the whole thing directly onto the wall in pencil.
And then I started painting and realized that I am way too uncoordinated to just PAINT something like that.
See those edges on the right side of the ball part? That was the problem. I’d taped off the straight line over on the right and liked how it looked, but I didn’t know what to do about the curves.
So, I had to come up with a plan. A plan which you will hear more about tomorrow.
