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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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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Xen

remix of d/3079 by u/kchplr

function u(t) {

x.fillText('🚲',(P=C(t)*1e6)>>8,Y=P%1e3);x.font=(P&Y/9)+'px X'

Aug 20 2017 7:54 PM UTC

}// 61/140

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just a simple Cycle Packer

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Xen

remix of d/3068 by u/statenlogic

function u(t) {

for(c.width=d=200,e=2e3;e;a=C(e)*T(d-t),b=S(e),z=C(e)*S(d-t),q=6e3/(z+159),x.fillRect(a*q+99,b*q+55,r=z>-9&&1+z**5*C(a),r))d+=e-=.5

Aug 18 2017 4:24 PM UTC

}// 131/140

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yokljo

function u(t) {

t==0?w=c.width=100:d=x.getImageData(0,0,w,w);for(a=256;a--;d.data[a*~~(S(t*w/a)*w)]=a);x.putImageData(d,0,0)

Aug 12 2017 10:50 PM UTC

}// 108/140

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This does some whack stuff on my desktop Chrome, which you may see if you attempt to edit the code (put a space at the end or something)

u/yokljo

Here is the minimum requirements for the weird Chrome bug to occur: t<.1?w=c.width=100:d=x.getImageData(0,0,w,w);x.putImageData(d,0,0)

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yokljo

remix of d/3040 by u/Xen

function u(t) {

c.width=99;for(i=2e2;i--;x.fillStyle=R(i*S(t)*5,i))x.fillRect(40+T(i+t*5)*10,30+S(i+t*5)*8,X=C(t*2+i)*4,X/2),x.fillText('ylophone',55,33)

Aug 9 2017 2:52 PM UTC

}// 137/140

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u/Xen

I approve! :D lol

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kchplr

remix of d/2938 by u/kchplr

function u(t) {

for(c.style='image-rendering:pixelated',c.width=i=130;i--;)for(j=70;j--;)x.fillRect(i,j,1,C(i*i*j*j*8+frame*8&768)<0)

Aug 9 2017 11:11 AM UTC

}// 117/140

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Same as the original but with c.style='image-rendering:pixelated' to look better and the same size

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cagr30

function u(t) {

(F=Z=>{for(x.fillStyle=R(W=1/Z*4e3,W/2,W/4),i=Z*Z*2;n=i%Z,m=i/Z|1,i--;n%-5^m%1&&x.fillRect((n-t%8-9)*W,(S(t)+m-1)*W,W,W));Z&&F(Z-6)})(36)

Aug 1 2017 3:57 PM UTC

}// 138/140

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aakok

function u(t) {

c.width=1920;for(j=0;j<360;j+=1){a=1920*T(t)*S(t);b=1080*T(t);x.beginPath();x.moveTo(a,b);x.lineTo(a*C(j)-b*S(j), a*S(j)+b*C(j));x.stroke()}

Jul 31 2017 10:49 AM UTC

}// 140/140

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Xen

function u(t) {

t?x.fillRect((F=frame)%3,C(F),1,1,x.fillStyle=R(F%69,F%96)):c.width=3

Jul 26 2017 6:36 PM UTC

}// 69/140

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Low-Res 69byte Plasma Gone wrong lol

u/iverjo

#plasma
u/BuRRak

67 if you use t*60 instead of frame

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FireFly

remix of d/2923 by u/Xen

function u(t) {

x.fillRect(C(t)*4+2,0,4,c.width=8)

Jul 21 2017 9:14 PM UTC

}// 34/140

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p01

remix of d/2571 by u/p01

function u(t) {

for(i=c.width|=0;i--;)x.fillText(i,i%99*9,C(i/t)*2e4/i+i)

Jul 19 2017 9:29 PM UTC

}// 57/140

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