Variegated technical notes and interactive demoshttps://motleytech.net/https://motleytech.net/blog/molecule-builder/https://motleytech.net/blog/molecule-builder/A 3D playground for building molecules, where the shapes are not looked up in a table but fall out of bond lengths and the fact that neighbours push each other away.Sun, 27 Sep 2026 00:00:00 GMThttps://motleytech.net/blog/self-balancing-trees/https://motleytech.net/blog/self-balancing-trees/Interactive simulations of AVL trees, Red-Black trees, B-trees and treaps, narrating every rotation, recolour, split and merge.Sun, 27 Sep 2026 00:00:00 GMThttps://motleytech.net/blog/tree-sequence-game/https://motleytech.net/blog/tree-sequence-game/A playground for the tree game that defines TREE(n), with a checker that decides whether each tree you play is legal.Sun, 27 Sep 2026 00:00:00 GMThttps://motleytech.net/blog/solar-eclipses/https://motleytech.net/blog/solar-eclipses/An interactive visualization of the Sun, Moon and Earth geometry that produces a solar eclipse.Sun, 22 Mar 2026 00:00:00 GMThttps://motleytech.net/blog/task-management/https://motleytech.net/blog/task-management/A lightweight, visual task board that runs entirely in the browser with no backend or account.Sun, 22 Mar 2026 00:00:00 GMThttps://motleytech.net/blog/balanced-tree/https://motleytech.net/blog/balanced-tree/An animated AVL tree that shows the rotations keeping insert, find and delete fast.Thu, 09 Apr 2020 00:00:00 GMThttps://motleytech.net/blog/minesweeper/https://motleytech.net/blog/minesweeper/The classic Minesweeper game rebuilt with React, plain CSS and a flood fill.Tue, 18 Feb 2020 00:00:00 GMThttps://motleytech.net/blog/reacttodolist/https://motleytech.net/blog/reacttodolist/A todo list built with React that persists to localStorage and survives closing the tab.Sun, 26 Jan 2020 00:00:00 GMThttps://motleytech.net/blog/sudokusolver/https://motleytech.net/blog/sudokusolver/A randomized JavaScript Sudoku solver, ported from an earlier Python version.Sun, 02 Jul 2017 00:00:00 GMThttps://motleytech.net/blog/orbit-camera/https://motleytech.net/blog/orbit-camera/Orbit controls that rotate and zoom around whatever object sits under the mouse pointer.Sat, 13 Aug 2016 00:00:00 GMThttps://motleytech.net/blog/magicsquare/https://motleytech.net/blog/magicsquare/How to construct magic squares of any order, where every row, column and diagonal share a sum.Fri, 29 May 2015 00:00:00 GMThttps://motleytech.net/blog/bezier-curve/https://motleytech.net/blog/bezier-curve/An interactive Bezier curve playground built on the curve support already in the browser.Thu, 16 Apr 2015 00:00:00 GMThttps://motleytech.net/blog/circle-chord-fun/https://motleytech.net/blog/circle-chord-fun/Periodic chords drawn inside a circle conjure up cardioids and other unexpected shapes.Sat, 22 Mar 2014 00:00:00 GMThttps://motleytech.net/blog/leo_szilard/https://motleytech.net/blog/leo_szilard/The physicist who patented the nuclear chain reaction and then spent his life trying to contain it.Sat, 15 Mar 2014 00:00:00 GMThttps://motleytech.net/blog/gravitytrain/https://motleytech.net/blog/gravitytrain/Gravity powered vacuum tubes through the Earth make every journey take the same 42 minutes.Fri, 17 Jan 2014 00:00:00 GMThttps://motleytech.net/blog/fallingintothesun/https://motleytech.net/blog/fallingintothesun/If the Earth were stopped in its orbit, how long would it take to fall into the Sun?Tue, 03 Dec 2013 00:00:00 GMT