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function u(t) {
} //
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u(t) is called 60 times per second. t: Elapsed time in seconds. S: Shorthand for Math.sin. C: Shorthand for Math.cos. T: Shorthand for Math.tan. R: Function that generates rgba-strings, usage ex.: R(255, 255, 255, 0.5) c: A 1920x1080 canvas. x: A 2D context for that canvas.

function u(t) {

}//
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  • BirdsTweetCodersDweet: I'm done --- t?0:s=0;for(c.width|=a=1e3;a--;x.stroke(),x.globalAlpha=.5)x.beginPath(),x.ellipse(960+200*C(a),540+200*S(a),90+30*S(a+s),90+30*C(a),0,0,7,x.strokeStyle=R(255*S(a)+255,255*C(a)+255,100+10*C(a))),s+=1e-4 --- 202 bytes, but full with colors and stuff, except for a weird bright area(?)... I dunno, see you all tommorow, I'm off to sleep :P
  • akm: I golfed it to 134 chars with transparency. for(c.width|=a=1e3;a--;)with(x)ellipse(960+200*C(a),540+200*S(a),90+30*S(a+t*6.2),90+30*C(a),0,0,7),stroke(),beginPath(globalAlpha=.5)
  • BirdsTweetCodersDweet: Solved the weird colors --- t?0:s=0;for(c.width|=a=2e3;a--;x.stroke(),x.globalAlpha=.5)x.beginPath(),x.ellipse(960+200*C(a),540+200*S(a),90+30*S(a+s),90+30*C(a),0,0,2*Math.PI,x.strokeStyle=R(255*S(a)+255,255*C(a)+255,100+10*C(a))),s+=1e-4

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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)