What you need:
- fat quarters in a spectrum of colors. I used red, orange, yellow, green, blue, and violet, oh and white for the clouds
- heat bond
- sweatshirt, doesn't have to be new
- thread in a coordinating color
- sewing machine
- pen or pencil
The first thing I did was wash my fabric and my sweatshirt. (Actually I lied. I didn't. But you should. Always.) Then I drew an arch on each color of fabric (except for white) starting with red, with each successive colored arch getting a little bit smaller. I drew the red one and cut it out, then used it to draw the orange one a bit smaller then cut that one out, then used it to draw the yellow one a bit smaller and so forth through violet. When I was finished all my arches of color fit right next to each other just like a rainbow. Next I drew my clouds on the white fabric and cut them out. This is what the sweatshirt looked like with everything laid out just so.
Once it was all laid out I cut my rainbow straight up the center so I could iron half of it on either side of the zipper. After all that cutting I cut out strips of heat bond and ironed them to the fabric arches and clouds. I peeled the backing off the heat bond and warmed the sweatshirt with my iron. I then placed my pieces and ironed them to the sweatshirt.
I set my sewing machine to a zig zag stitch with a length of just about zero and a width of five. I stitched around everything in blue.
When I was finished with that I ironed the sweatshirt and rainbow one more time and ta da! This is what it looks like. I love it. But she loves it more. Doesn't want to take it off. That's the best.