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.
Golfed down to 157: w=c.width|=f=b=>b>0?'clearRect':'fillRect';s=S(t);Z=950*s**4+50;x[f(u=C(t)*Z)](0,0,w,w);x.transform(u,z=s*Z,-z,u,960,540);for(i=18;i--;)x[f(i&1)](i-9,-2,1,4)
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)