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Apparently, it is far more efficient to just seek around the terminal and overwrite the characters that you need rather than rewriting the whole scene every time 😁I was briefly confused by it being offset by one. Turns up "move left 0" is treated as "move left default amount", which is 1. Not 0. Then briefly caught out by 0 not being falsey in Ruby (because I did Advent of Code in Ruby as a challenge)#AdventOfCode #ANSI #CLI