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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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Current theme challenge: #Food

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yonatan

remix of d/9963 by u/BalintCsala

function u(t) {

for(c.width=j=i=400;i--;x.fillRect(200-s,k+S(k/6-t)*9+32,s*2,6))f=i&1&&(i+t*50)&4,k=(j-i)>>1,x.fillStyle=R(q=f?255:k,q,k),s=k*k/(f?3e3:99)

Sep 20 2018 10:57 PM UTC

}// 138/140

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More late night golf with u/BalintCsala (thanks!)

u/katkip

Awesome
u/sigveseb

Now someone add a car :)

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BalintCsala

function u(t) {

for(c.width|=i=500;i--;x.fillRect(C(k)*250+910,S(k)*99-H*S(J)*9,3,959))x.fillStyle=R(a=(S(k=i/160)+1+(H=(a=k*3+t)%2<1)*C(J=a/.32)/2)*99,a,a)

Sep 20 2018 10:28 PM UTC

}// 140/140

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Pillar, huge thanks to u/yonatan for helping with golfing

u/katkip

Looks real
u/sigveseb

Nice!
u/joeytwiddle

#model

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username

remix of d/9645 by u/username

function u(t) {

with(x)for(i=shadowBlur=99,n=9999;i--;shadowColor=`hsl(${_=t*i} 99%50%`,fillStyle=`hsl(${_*9} 99%94%`)fillRect(i*99+S(t)*n-n,C(t)*i*99,99,n)

Sep 20 2018 9:40 PM UTC

}// 140/140

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architecture

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anotherkitten

function u(t) {

eval(unescape(escape`琿愿愫⬺戽㄰⩓⡴⤫㄰㩡㴰㭯湣汩捫㵟㴾愽愿〺ㄻ挮睩摴栽㉥㌻景爨朽㐲ⱪ㴹〬欽㤹㤻欼ㅥ㌻樫㵢Ⱬⴽ札⴩樭㤰㹡⩢☦砮晩汬剥捴⡪Ⱬⰹⰹ⤻砮景湴㴢㐰ば砠䄢㭸⹦楬汔數琨≜田〰㜢ⱡ⩢Ⱝ㐲⩡⬮㔪愪⨲⬱ㄲ〩`.replace(/u(..)/g,"$1%")))

Sep 20 2018 9:06 PM UTC

}// 140/140

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click to throw the ball, click again to reset

u/anotherkitten

original: t?a?a++:b=10*S(t)+10:a=0;onclick=_=>a=a?0:1;c.width=2e3;for(g=42,j=90,k=999;k<1e3;j+=b,k-=g--)j-90>a*b&&x.fillRect(j,k,9,9);x.font="400px A";x.fillText("\u0007",a*b,-42*a+.5*a**2+1120)
u/katkip

#physics
u/katkip

#game
u/katkip

#interactive

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acorv

function u(t) {

c.width=w=100+(1+S(t*12))*260;
for(i=25;i>8;i--){
x.beginPath()
v=i%2?60:0
x.fillStyle=R(v,v,v)
x.arc(w/2,w/3.55,i*w/90,0,7);
x.fill();
}

Sep 20 2018 8:16 PM UTC

}// 138/140

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Speaker

u/katkip

Wow, that's a genius idea! I love it
u/katkip

Wow, that's a genius idea! I love it
u/yaska

I can hear sound along with it. Synthaesthetic.
u/iverjo

The sound of saturday night

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Agnes

remix of d/9934 by u/anotherkitten

function u(t) {

c.style.background=R();if(t<34)with(x){shadowColor=`hsl(${t*99},76%,66%)`
shadowBlur=19
fillRect(9,9,9,9)
translate(25,8)
rotate(t*2.10587)}

Sep 20 2018 7:18 PM UTC

}// 140/140

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Same as the remixed dweet, except the HSL works on iOS Safari.

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Hedgehog

remix of d/9969 by u/Hedgehog

function u(t) {

x.strokeRect(Math.random()*1920,Math.random()*1080,200,200)

Sep 20 2018 5:19 PM UTC

}// 59/140

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One color also not bad

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Hedgehog

remix of d/9969 by u/Hedgehog

function u(t) {

x.fillStyle = R(Math.random()*255, Math.random()*255, Math.random()*255)
x.fillRect(Math.random()*1920,Math.random()*1080,200,200)

Sep 20 2018 5:17 PM UTC

}// 130/140

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Hmmmm №2

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Hedgehog

function u(t) {

x.strokeStyle = R(Math.random()*255, Math.random()*255, Math.random()*255)
x.strokeRect(Math.random()*1920,Math.random()*1080,200,200)

Sep 20 2018 5:16 PM UTC

}// 134/140

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Hmmmm

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katkip

remix of d/9966 by u/katkip

function u(t) {

if(!t){p=n=>[...Array(n).keys()].slice(2).map(i=>!(n%i)).includes(!0);for(i=0;i++<21201;)p(i)?0:x.fillRect((i%190)*10,(i%112)*10,20,20)}

Sep 20 2018 5:13 PM UTC

}// 136/140

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Perfectly golfed by u/anotherkitten