The geometric shape of the pattern inside the front face of the pillow will help you begin to learn how to read graphghans as well as learning how to change colours as you move along each row.
With each colour requires Bobbins. Those are individual yarn balls. For example, you see the green triangles, those are strands from two different yarn balls. BUT… let me give you a tip. If I were you, I would grab the strand of the inside of a ball for one triangle and then grab a strand from the outside of the same ball for the other triangle. This way, you don’t have to make an additional ball and can use the ball for both.
The graph is included with the free pattern. Have fun with this design.