Analysis of information sources in references of the Wikipedia article "William S. Burroughs" in English language version.
"Another early admirer of the song was William S. Burroughs, who, of course, also ended up on the cover of Sgt. Pepper," McCartney wrote.
The cover famously included images of both William S. Burroughs and North Beach fixture Lenny Bruce
There is no exact process. If you want to do shotgun art, you take a piece of plywood, put a can of spray paint in front of it, and shoot it with a shotgun or high powered rifle.