Gravity sort (aka bead sort) is a sorting algorithm that operates by simulating beads sliding down parallel poles. Elements of the list "fall" into sorted order. Gravity sort is an integer sort, i.e. it can only sort integers but it takes advantage of integer arithmetic to sort. https://en.wikipedia.org/wiki/Bead_sort
Part of my series of sorting algorithms: https://scratch.mit.edu/studios/14132246/
