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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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geb

function u(t) {

throw u==u.toString("") ? u.toString(""):"time >> money."

Feb 2 2021 7:47 PM UTC

}// 57/140

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Xen

remix of d/10652 by u/Xen

function u(t) {

for(t+=i=99;i--;x.fill(P=new Path2D,P.arc(960+C(p*t)*i,540+S(p*t)*i,i*3,0,9)))x.fillStyle=`hsl(${(p=i-t%1)*t},50%,${p&1?1:5}0%)`

Feb 2 2021 3:06 PM UTC

}// 128/140

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quick play

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ciaccodavide

remix of d/21560 by u/ciaccodavide

function u(t) {

c.width|=1
f=(X,Y,s)=>(h=s/2,x.fillRect(X-h,Y-h,s,s),s>3&&(f(X-s*S(t),Y-s,h,f(X+s,Y+s,h,f(X+s,Y-s,h,f(X-s,Y+s,h))))))
f(960,540,199+S(t)*99)

Feb 2 2021 1:54 PM UTC

}// 140/140

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#recursive squares to #sierpinski

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ciaccodavide

remix of d/21544 by u/ciaccodavide

function u(t) {

W++,W%=3e3
for(i=3e3;i--;)T=t*(i+t)*i%3,X=~~T%2==0?X/f:(W-X)/f+X,Y=T<2?Y/f:(W-Y)/f+Y,x.fillRect(X,Y,1,1)}{f=X=Y=2,W=1

Feb 2 2021 8:30 AM UTC

}// 117/140

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#sierpinski growth

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andrea270872

remix of d/21546 by u/andrea270872

function u(t) {

c.width|=t?(t%4<.01?u.a=[1,...u.a.map((n,i)=>n+u.a[i+1]||1)]:0):u.a=[]
u.a.map((n,i)=>{for(j=0;n;n>>=1)x.fillRect(i*99,j++*99,90,(n&1)*90)})

Feb 1 2021 5:54 PM UTC

}// 140/140

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Wait for it...

u/andrea270872

For some reasons I cannot do it with a single map operation... anybody can see why?

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ciaccodavide

remix of d/21539 by u/ciaccodavide

function u(t) {

for(i=3e3;i--;)T=t*(i+t)*i%4,X=C(~~T%2==0?X/f:(W-X)/f+X)*W,Y=S(T<2?Y/f:(W-Y)/f+Y)*1080,x.fillRect(X,Y,1,1)}{f=X=Y=2,W=1920

Feb 1 2021 2:45 PM UTC

}// 122/140

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ciaccodavide

function u(t) {

for(i=3e3;i--;)T=t*(i+t)*i%4,X=~~T%2==0?X/f:(W-X)/f+X,Y=T<2?Y/f:(W-Y)/f+Y,x.fillRect(X,Y,1,1)}{f=X=Y=2,W=1920

Feb 1 2021 2:42 PM UTC

}// 109/140

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taupelink

remix of d/21506 by u/taupelink

function u(t) {

for(i=512;i>>=1;x.fillRect(80*X,80*Y,g=i/t,g))f=i*t,X=f*f%33-9,Y=X*f%23-9,h=C((q=C(Y/i)*X)*(p=C(X/i)*Y))*9,x.fillStyle=R(h*h*q,h*h*p,h*p*q)

Jan 31 2021 11:25 PM UTC

}// 139/140

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d/21529

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smtsjhr

remix of d/21499 by u/smtsjhr

function u(t) {

c.style.filter='invert()blur(5px)';for(c.width|=i=1e3;i--;){x.lineTo(960+400*S(i),540+400*C(i+t*T(t/10)))}x.stroke(); console.log(t)

Jan 31 2021 5:20 AM UTC

}// 132/140

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You won't believe your eyes when you watch this loop starts to wobble faster and faster!

u/smtsjhr

**FLASH / STROBE WARNING**

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smtsjhr

function u(t) {

c.width|=0
x.font='350pt F'
x.fillText(`🦉 🍭${t/2|0}`,100,800)
x.fillStyle='#ff69b4'
x.fillRect(390,500,320*C(Math.PI*t/2)**2,30)

Jan 29 2021 8:24 PM UTC

}// 128/140

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How many licks does it take? #candy

u/smtsjhr

a dumb idea that i think is a good idea. (**only tested with Apple "owl" and "lollipop" emoji**)
u/smtsjhr

boo it seems the tounge needs realigning on iOS