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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/20559 by u/MAxSaL

function u(t) {

for(x.translate(979,550,c.width|=i=256);i--;x.rotate(22/7/3))x.rect(-1e3,(j=i%69)*13,3e3,C(j/13+t)*69)
x.fill`evenodd`

Nov 11 2020 12:07 AM UTC

}// 118/140

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u/donbright

now that's what im talking about.

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ciaccodavide

remix of d/20530 by u/ciaccodavide

function u(t) {

P=18

for(K=0;K<960/P;K++)x.fillStyle=R(g=66+96*Math.random()*.02*K,g*.7,g*2),
x.fillRect(K*P,K*P,1920-P*K*2,960-P*K*2)

Nov 10 2020 4:13 PM UTC

}// 119/140

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u/donbright

funky

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yonatan

function u(t) {

c.width|=0
x.lineWidth=S(t)**2*2e3
x.lineJoin='round'
x.strokeRect(960,540,1,1)

Nov 9 2020 4:09 PM UTC

}// 79/140

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circle

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taupelink

remix of d/20515 by u/taupelink

function u(t) {

r=Math.random;for(i=k=60;i--;x.fillRect(k*X,k*Y,i/t,i/t))X=r(Y=r()*18)*32,h=i*S(Y%S(C(p=Y-X*X/9))%C(q=X/3-Y*Y/9)),x.fillStyle=R(h*q,h*p,h*6)

Nov 8 2020 9:20 PM UTC

}// 140/140

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d/20525

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Xen

remix of d/20499 by u/rodrigo.siqueira

function u(t) {

t?x.rotate(C(x.lineWidth=4/t)/59):x.translate(960,540)
d=1e3*S(t/3),x.strokeRect(-d,-d,2*d,2*d)

Nov 6 2020 4:49 PM UTC

}// 95/140

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play and golf

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rodrigo.siqueira

remix of d/20495 by u/Noobisuke

function u(t) {

if(!t)x.translate(960,540)
if(t<1.5)x.lineWidth = 8/t,x.rotate(t/9),d=950*(1-S(t))
x.strokeRect(-d,-d,2*d,2*d)

Nov 6 2020 3:00 PM UTC

}// 110/140

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Spiral formation (rotating squares) #spiral

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ashish9b

remix of d/9601 by u/f8f82804

function u(t) {

for(i=300;i--;t||x.strokeRect(3,2,994,99))x.setTransform(s=9*S(i),3,4,s,i%3*420+790,360*(i/5%+1|0)),x.rotate(s/64)

Nov 6 2020 12:09 AM UTC

}// 114/140

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Canopy

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ashish9b

remix of d/1668 by u/sawaxon

function u(t) {

c.width=1920;for(j=3;j<6;j++)for(i=5;i<122;i++)x.fillRect(900+S(19+i/(S(t*j)*29))*j*90,500+C(i/((t+149)/9))*j*80, 19, 19)

Nov 6 2020 12:04 AM UTC

}// 121/140

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SYNTH

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ashish9b

remix of d/20488 by u/ashish9b

function u(t) {

for(Y=t*5,X=599;X--;x.fillStyle=R(o=332*T(S(C(Y/X-Y*X)-t-S(X/(Y+T(Y*22+Y/9))))),o*.4))x.fillRect(X/Y,22,222,2222)
x.drawImage(c,3,1)

Nov 5 2020 11:31 PM UTC

}// 132/140

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Forest Fire

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ciaccodavide

function u(t) {

c.width|=p=playing
x.font=`3em monospace`
x.fillText((p?'Playing ':' Paused ')+u,0,540+S(t)*99,1920)
document.onclick=p?pauseDemo:playDemo

Nov 4 2020 10:53 AM UTC

}// 138/140

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Play and pause demo on click