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.
Shortened by 6 characters: with(x)for(X=960,Y=540,a=t*2,d=90,i=0;i++<9+t;moveTo(X,Y),lineTo(X-=d*S(a),Y-=d*C(a)),stroke(),d*=.9,a+=Math.random()-.5)beginPath()
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)