Getting better at making rugs

I'm getting getter at making the rag rug with the toothbrush method.  I'm figuring out what works and what doesn't work for me.  Below is a picture of my 2nd attempt at rug making, measuring  35in x 22in.

And my 3rd attempt, my first try at doing a round one, pictured below. It is 28 inches across. I wanted to make this one bigger, but sadly ran out of yellow material. Note to self: don't by twin sheets, they are too small! Which is a shame, because I really love the buttery yellow color of this one.