function u(t){


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  • joeytwiddle: Popped in to debug an ellipse for work. Felt rude not to leave a dweet.
  • jick: Oh, neat periodic clear trick.
  • joeytwiddle: I found that trick in a random dweet I saw recently. No idea which one.

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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)