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.
#treeif(!t){z=[];for(r=Math.random,i=69;i--;)z.push({a:r(),x:y=960,y:y})} for(i of z)x.fillRect(i.x+=S(i.a),i.y-=C(i.a)+.8,v=9/t,v),i.a+=S(r()*99)/6,q=r()*69|0,w=r()*69|0;z[w].x=z[q].x,z[w].y=z[q].y
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)