Animated Knots

http://www.animatedknots.com/

Each knot automatically "ties itself" when the page opens. Fast and Slow buttons allow each animation to be replayed. Many of the animations can also be reflected left for right or inverted with the Normal, Mirror, Inverted, Rotated buttons under the title. To study each stage, the animation can also be played step by step: just move the mouse over the row of numbered buttons under the knot. For many knots an extra button, Structure, shows a picture which helps understand the way the knot "fits together".