I failed multiple times. Making the red (upper part of circle) was fairly easy. But, another half with blue was harder than I thought.
While I was expereincing some failures, I got a new idea. I wanted to create a new identical upper circle shape and rotate it to put it under the red upper circle, but I don't know how to do rotate the identical new figure using the point the pen stops as a center of rotation. I don't know if it's even possible. So, I just keep trying my original plan, which was just using a big half circle and two half circles.