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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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katkip

function u(t) {

x.fillRect(960+C(t*99)*t*20,540+S(t*20)*t*20,t,t)

Dec 9 2018 2:04 PM UTC

}// 49/140

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Tlilxochitl's Flower #fractal. Is this the most golfed fractal on dwitter?

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katkip

function u(t) {

eval(unescape(escape`稽䵡瑨⹲慮摯活楦⠡琩筘㵛崬夽孝ⱑ㴰ⱗ㴰㭦潲⡩㴱〻椭ⴻ⥘⹰畳栨稨⤪㤶〩ⱙ⹰畳栨稨⤪㤶〩㭦潲⡰⁩渠堩儫㵘孰崬圫㵙孰崬砮晩汬剥捴⡘孰崬奛灝ⰹⰹ⤻砮浯癥呯⠰ⰰ⤻砮汩湥呯⡑⼵ⱗ⼵⥽砮獴牯步⠩`.replace(/u(..)/g,"$1%")))

Dec 8 2018 7:54 PM UTC

}// 138/140

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I tried to make a similar algorithm to the linear regression algorithm! Machine learning #ai prediction inside dwitter! If you think this doesn't deserve an awesome, search on google what is linear regression ;) I couldn't golf all the formulas so I used the mean calculus. z=Math.random;if(!t){X=[],Y=[],Q=0,W=0;for(i=10;i--;)X.push(z()*960),Y.push(z()*960);for(p in X)Q+=X[p],W+=Y[p],x.fillRect(X[p],Y[p],9,9);x.moveTo(0,0);x.lineTo(Q/5,W/5)}x.stroke()

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katkip

function u(t) {

x.fillRect(0,0,2e3,2e3);for(i=214;i--;)
x.clearRect(i*9,540,9,400*S(i/6+t+T(i+t)/99));
x.drawImage(c,S(t*420)*20,C(t*69)*20)

Dec 6 2018 12:49 PM UTC

}// 124/140

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#glitch ed frequence

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rnbw

function u(t) {

x.font='1pt"';for(i=0;i++<6;){x.fillText("🔯🍡",960,540+T(t*i)*40000);x.drawImage(c,5*S(t+i),5*S(t-i),1920+10*C(t-i),1080-10*S(t+i))}

Dec 4 2018 7:29 PM UTC

}// 131/140

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a nebula! ⭐

u/magna

Nice!
u/rnbw

(turns out it looks best with chrome os or ios, though it looks WILDLY different on either...)

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metamero

function u(t) {

eval(unescape(escape`景爨稽㜲Ᵽ⹷楤瑨簽欽〻欼㈵㔻欫⬩漽⡲ⱳⱡ⤽㹸⹲散琨爬猬愬愩Ⱪ㵫☱㔬樽款㸴ⱪ☽ㄵⱰ㴴㈰⭺⩩ⱱ㵺⩪Ⱪ㰱㔿⠨椫権┲㼰㩯⡰ⱱⱺ⤬漨瀫⡫┲㼴㠺㐩ⱱ⬨欦㈿㐸㨴⤬㈰⤩㨰㭸⹦楬氨❥癥湯摤✩`.replace(/u(..)/g,"$1%")))

Nov 30 2018 5:59 PM UTC

}// 134/140

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#OpticalIllusion

u/katkip

#illusion cool
u/metamero

for(z=72,c.width|=k=0;k<255;k++)o=(r,s,a)=>x.rect(r,s,a,a),i=k&15,j=k>>4,j&=15,p=420+z*i,q=z*j,i<15?((i+j)%2?0:o(p,q,z),o(p+(k%2?48:4),q+(k&2?48:4),20)):0;x.fill('evenodd')
u/ceaga

kanji chester!

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pavel

remix of d/11192 by u/pavel

function u(t) {

for(k=c.width|=w=120;i=k-->>6;x.rect(--j*w+o(t),(i-2)*w+o(t-1.6),s=k%2?j+i&1&&w:60,s))j=k/2&31,o=n=>k%2*w/(2+1e9**C(n))
x.fill('evenodd')

Nov 30 2018 2:37 AM UTC

}// 137/140

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rodrigo.siqueira

remix of d/11140 by u/jylikangas

function u(t) {

c.width^=0
for(0,X=i=840;i--;)x.fillRect(i*3,X,3,S(i*6.3-t)*57-150)
x.font='2in"';x.fillText('✈',t*40,N=70*S(t)+510),x.fillText('🏎️',N,960)

Nov 25 2018 2:13 PM UTC

}// 139/140

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Airplane flying, car and mountains

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anotherkitten

function u(t) {

x.fillStyle=`hsl(${t**2} 50% ${(t%(8/t)<4/t)*50}%`
x.fill(p=new Path2D,p.arc(960,540,50,0,7))
x.drawImage(c,-72,-40,2064,1160)

Nov 24 2018 5:48 PM UTC

}// 126/140

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if you stare too long it does the shrinky vision thing

u/tomxor

Holly crap, I thought my screen was melting after I directed my eyes back to the comments. Needs a good 30 secs to get fast enough.
u/Xen

love it!

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magna

function u(t) {

c.width|=0;x.font='3em monospace';document.scripts[4].innerHTML.split`\n`.some((_,r)=>x.fillText(_,0,++r*48-t*100))

Nov 22 2018 9:45 PM UTC

}// 115/140

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pavel

remix of d/11101 by u/pavel

function u(t) {

for(f=i=405;i--;f=x[f?'fillRect':'clearRect'](-1,-1,2,2))x.setTransform(s=32+S((i+(j=i>>5)+t)*Math.PI)*16<<f,0,0,s,i%32*99,j*99),x.rotate(t)

Nov 21 2018 6:39 AM UTC

}// 140/140

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Dancing Squares #beesandbombs

u/pavel

This one took a lot of golfing. Calling rotate separately actually saves bytes as it avoids the scale definition / multiplication
u/katkip

!