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function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<9;i++)
x.fillRect(400+i*100+S(t)*300,400,50,200) // draw 50x200 rects

} // 122/140

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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.

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@no_identd

remix of d/4868 by u/Pjaerr

function u(t) {

c.style.background=R();x.fillStyle=R(...[S,C,T].map(_=>127*(_(t)+1)));a=1.3324789*frame;r=8*frame**.5;x.fillRect(r*C(a)+960,r*S(a)+540,8,8)

Jan 17 2018 3:23 PM UTC

}// 139/140

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https://link.springer.com/article/10.1007/s0… Golden *morphic* angle for circles. 76.34541 if you want degrees. Both are the best *and* shortest single float approximation respectively. The traditional golden angle of 137.50777 degree (2.3999631 radian) has its uses, but this one has a few more tricks up its sleeve.

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@no_identd

remix of d/4509 by u/ben

function u(t) {

function v(a,b,g,r){if(r>1){x.fillRect(a+=r*S(g),b-=r*C(g),.1,1)
v(a,b,g-1+C(t),r*=.7634541)
v(a,b,g+.1+S(t),r)}}c.width=540
v(250,270,0,80)

Jan 17 2018 2:00 PM UTC

}// 140/140

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@no_identd

remix of d/4101 by u/Xen

function u(t) {

g=1.618034
for(c.width|=Y=i=300;i--;x.fillStyle=R(Z=g^(C(i+t*4)*Y),Z*S(t),5-Z,.6))x.fillRect(i*g*10,Y+C(2*t+(i*76.34541))*g*100,t/g-g*t,Y)

Jan 17 2018 1:54 PM UTC

}// 138/140

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@no_identd

remix of d/4101 by u/Xen

function u(t) {

g=1.618034
for(c.width|=Y=i=300;i--;x.fillStyle=R(Z=g^(C(i+t*4)*Y),Z*S(t),5-Z,.6))x.fillRect(i*g*10,Y+C(2*t+(i*126.869896))*g*100,t/g-g*t,Y)

Jan 17 2018 1:53 PM UTC

}// 140/140

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tillsc

remix of d/6142 by u/echox

function u(t) {

e=S(t)*99;c.width=(C(t)+2)*999;x.rotate(t);x.fillStyle=R(e,e*2);for(b=-99;b<99;b+=1){for(a=-99;a<99;a+=1){x.fillRect(a*90,b*90,50,50)}}

Jan 17 2018 1:23 PM UTC

}// 135/140

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echox

function u(t) {

c.width=C(t)*2999;x.fillStyle=R((t*99)%99,(t*99)%255,(t*99)%99);for(b=0;b<9999;b+=99){for(a=0;a<9999;a+=99){x.fillRect(a,b,50,50)}}

Jan 17 2018 12:53 PM UTC

}// 131/140

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zanella

remix of d/6048 by u/staberinde

function u(t) {

x.fillStyle='#fff1'
x.fillRect(0,0,2e3,1e3)
x.fillStyle=R()
for(i=361;i--;)
x.fillRect(C(i)*i*C(t*i/360)+960,S(i)*i*C(t*i/360)+540,10,10)

Jan 17 2018 12:41 PM UTC

}// 137/140

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Adding some trail effect. ;)

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Wammbox

function u(t) {

c.width=1920
for(i=0;++i<999;){
x.fillStyle=R(-t+0+i/5,255,-t+0+i/5)
x.fillRect(960+S(t)*i,100+S(t),1,i)
}

Jan 17 2018 12:15 PM UTC

}// 107/140

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Blacklink

function u(t) {

a=t*.5^1
for(z=i=c.height^=0;i>0;i--){x.fillStyle=R(m=i/z*255,m,99);x.fillRect(S(t+i*a)*886+886,i,150,1)}x.font='99px f';x.fillText(a,99,99)

Jan 17 2018 10:18 AM UTC

}// 140/140

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Updated with better colours and way to change the speed, standard of .5; still counts weird but that's okay

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Blacklink

function u(t) {

a=t^1
for(z=i=c.height^=0;i>0;i--){x.fillStyle=R(m=i/z*255,m,0);x.fillRect(S(t+i*a)*886+886,i,150,1)}x.font='99px f';x.fillText(a,99,99)

Jan 17 2018 10:15 AM UTC

}// 136/140

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had to do t^1 instead of Math.Round cuz character limit so it counts weirdly but does go through all of them