man walking animation

You can use HTML5 Canvas feature with Javascript: http://en.wikipedia.org/wiki/Html5_canvas[^].

It will take considerable effort, but what you can do is quite impressive:
http://net.tutsplus.com/articles/web-roundups/21-ridiculously-impressive-html5-canvas-experiments/[^],
http://net.tutsplus.com/articles/web-roundups/21-ridiculously-impressive-html5-canvas-experiments/[^].

You can find several engines already designed, in particular, for creation of vector graphics interactively but the user:
Raphaël: http://raphaeljs.com/[^],
CAKE: http://code.google.com/p/cakejs/[^],
Paper.js, a vector-graphics scripting network: http://paperjs.org/[^],
Burst Engine: https://github.com/rwaldron/burst-core[^].

See also this Mozilla tutorial: https://developer.mozilla.org/en-US/docs/Web/Guide/Graphics/Drawing_graphics_with_canvas?redirectlocale=en-US&redirectslug=HTML%2FCanvas%2FDrawing_Graphics_with_Canvas[^].

—SA

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