Backup camera images typically feature red and green lines overlaid on the screen to give you a sense of the car's boundaries: Green is a polite distance to leave between you and the car you're parallel parking in front of, red is the closest you can get without trading paint. But this Reddit user, seeking to park right up to the wall of his garage, was unsatisfied with the lines. He worked up his own (impractical, but funny) hack for greater precision:
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