That looks great, thanks for showing us the work in-progress.
I first became aware of MC Escher in about 1969, while in college in MI. I saw his work in something I read in the college library, and became a (from that point) life-long admirer of his work. I have a lot of posters of his work, and some are in Day-Glo colors, they still look great under a UV light.
I have several books of his work, and when a show of his art came to Ft. Lauderdale last century, I went to see it. Well-worth the price of admission.
Now, just get that stand up the stairs and get to work, I bet you could sell those.

A psychedelic rock group from Philadelphia,
Mandrake Memorial, used the picture above as a cover for their double-disc album. When you opened-up the cover and turned the cover over, this was what you saw. The double-disc was released in 1969. I saw them live when they came to the college when contracted by student government.