I am late getting this week's challenge posted, but it was a fun one. Do a monotangle using Pointillism or Stippling, which is making your picture, or in this case tangle, using nothing but tiny dots. You can vary the degree or volume of dots to create shading or highlights. I used the tangle, Fife for this challenge.
I took an online Stippling class a couple of years ago from Geneviève Crabe of Tangle Harmony fame. It was a fun class and I learned a lot. You really have to have patience to do this type of art, but you can also really get in the "zen zone" too! Here is the stippled rose and tulips I did from that class.