I am not going to call these circles, because really they are blobs. But I am making them in the same manner one makes a circle. I draw the shape on the warp and then I weave around the marks making sure to really pound down on the warp. I have outlined my blobs with black. Once I’ve half filled the outside, I fill it in with the interior colors.
Let me show you my progress:
If you want to learn more about making blobs (or actually, in this class, actual circles) you might want to take this class: Craftartedu Beginner Tapestry Class