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.
looks like an animated tribal tattoo: for(c.width|=i=0;i<6.3;i+=.01){x.lineWidth=8 r=(.3*S(t+C(t-i)))*(.5*C(S(i*9)))*2e3 a=i+S(r/99+t) x.lineTo(960+r*C(a),540+r*S(a)) }x.fill()
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)