<b_jonas> slashlearn euclid//Euclid is a short geeky game in which the goal is to do Euclidean compass and straightedge constructions in as few steps as possible. It runs in the browser, found at "http://www.euclidthegame.com/". It was popular among #esoteric regulars in 2016-07.

#!/bin/bash
if [ "$1" ] && url "$1" 2>/dev/null # Save making a file when it already exists.
then
    true
else
    PASTENUM="$RANDOM"

    mkdir -p $HACKENV/tmp/paste

    url $HACKENV/tmp/paste/paste."$PASTENUM"
    cat -- "${1--}" > $HACKENV/tmp/paste/paste."$PASTENUM"
fi