[toppy]

For Commodore there is this classic recipe [1] for infinite maze:

10 PRINT CHR$(205.5+RND(1)); : GOTO 10

[1] https://10print.org/

[teddyh]

  python3 -c 'import random, time, itertools; any(time.sleep(0.01) or print(random.choice("\u2571\u2572"), end="", flush=True) for x in itertools.repeat(None))'

[mkesper]

Note this doesn't guarantee passable maces.