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by mryall 302 days ago
TLDR: the program prints a pseudorandom sequence of characters 205 and 206, which on Commodore 64 are graphics characters similar to / and \.

When repeated across multiple lines, it looks like an intricate random maze. But it is actually just a visual representation of whatever PRNG is used on the platform, with the default seed as set by the BASIC interpreter.

https://sta.c64.org/cbm64pet.html