Algorithm:
Cormen, Thomas H, and Thomas H. Cormen. Introduction to Algorithms. Cambridge, Mass: MIT Press, 2001.
Webdesign:
Draw an arrow in svg: http://static.kancloud.cn/digest/d3-medium/195058
Line animation in svg: https://css-tricks.com/svg-line-animation-works/
Generate random color in css: https://css-tricks.com/snippets/javascript/random-hex-color/