Take a Unit #1a and sew it to a Unit #3 like below. Make two of them and call them Unit #5
Sew a Unit #1 and a Unit #2 together to make something we’ll call Unit#6. It will look like this:
Make ten of them altogether.
Sew a 3″ square of background fabric to a triangle of backgroudn fabric like below:
Then sew another triangle to it so that it looks like this:
We’ll call this Unit #7 and you will need four of them.