Blind contour fridays

I've found an online practice (?) "Blind Contour Fridays" , so I thought this was a perfect place for me to start this up again. Of course, it was something very difficult for me: sky. I lay down on my back and looked straight up at the sky and drew everything around it. There's the wall of the building and the trees above me.

I wasn't very happy with that, so then I tried looking at the leaves of just one tree and drawing the negative space. Which is exactly what I need to be drawing -- the sky is everything that isn't there.

Finally I gave up and just drew my cat....