Woman in the Dunes is a 1964 Japanese film directed by Hiroshi Teshigahara. It's about a guy who gets trapped in a sandpit and has to keep shovelling sand to stay alive! It's a repetitive and futile situation! Ring any bells? ... Check out my new book! It's called The Last Human: How Technology is Changing What it Means to be Human
https://www.amazon.com/Last-Human-Technology-Changing-Means/dp/1069510831/