If you've reached this far, you've worked through colorizing your output, writing various dynamic progress indicators, and finally writing a small, bare-bones command line using Ansi escape codes that echoes user input back at them. You may think these three tasks are in descending order of usefulness: colored input is cool, but who needs to implement their own command-line when every programming language already has one? And there are plenty of libraries like Readline or JLine that do it for you?
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Standard Digital
print "\nechoing... ", input