function u(t){


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  • joeytwiddle: Minor improvement: if(t%1<.3)
  • joeytwiddle: Improved bars: for(i=X=25;X<170;X++)r()<.6&&x.fillRect(X,9,1,78)

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u(t) is called 60 times per second. t: elapsed time in seconds. c: A 1920x1080 canvas. x: A 2D context for that canvas. S: Math.sin C: Math.cos T: Math.tan R: Generates rgba-strings, ex.: R(255, 255, 255, 0.5)