This month's Michael Strong sketch is this:
I had an idea to try the 3 strips in blue and have the center as Mike's Christmas tree. That evolved to the blue being a starry night background and I could use my Crosshatch stamp and put white dots where the lines met for stars. The sponging starts off light on the bottom strip but then gets darker and darker for the top strip. I tried to use both my white pens but both had dried up so I ended up using white paint instead. Now for the tree.
I tried first with white shimmer paint for the tree to show a snow glistening tree: