Yellow and gray all day.
Pick out a couple different fabrics, I used three. One yard of each fabric. Cut about 1/4 in. up the fabric and about one inch spacing between each cut. From each of the cuts, rip the entire length of the fabric into several strips.
I had an extra long piece of the gray fabric that I used for the base. You can also use twine or other heavy string.
Tie the fabric strips in knots around the base piece. I tied the knots in several different places so the fabric would have different lengths, lots of long pieces, short pieces, and middle pieces.