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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/14895 by u/WasifBoomz

function u(t) {

for(c.width|=0,i=4e3;i--;)x.fillRect(Math.random()*2e3,Math.random()*1080,S(i)*9,C(i)*9)

Jul 3 2019 2:29 PM UTC

}// 88/140

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quick test

u/Xen

#static

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WasifBoomz

function u(t) {

if(t==0)a=0
x.lineWidth=9
x.lineTo(0,540);x.lineTo(1920,540);x.stroke()
if(t>a/5){x.arc(960,540,t*100,0,9);x.stroke();a++}

Jul 2 2019 9:53 PM UTC

}// 122/140

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u/joeytwiddle

Remix: t=t*7|0,x.lineWidth=t,x.beginPath(),x.arc(960,540,t**2,0,9)x.stroke()

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Xen

remix of d/14887 by u/Blacklink

function u(t) {

for(c.width|=i=111;i--;x.stroke())x.beginPath(x.lineWidth=(q=(t*5*(i+t))%1e3)/8),x.arc(980,540,q,i+t/i,i+t/i+1)

Jul 2 2019 7:27 PM UTC

}// 111/140

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had to have a play with this one

u/Xen

#spiral

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stefano

function u(t) {

c.width=1920;d=60
for(i=1;i<32;i++)
for(j=1;j<18;j++)
{
h= C(t)*(d*S(i/32));
w= C(t)*(d*S(j/18));
x.fillRect(i*d-w/2,j*d-h/2,w,h)
}

Jul 2 2019 12:44 PM UTC

}// 132/140

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KilledByAPixel

remix of d/14830 by u/pavel

function u(t) {

eval(unescape(escape`𨰮𬱴𮑬𩐮𨡡𨱫𩱲𫱵𫡤👠𪁳𫀨𙁻𭀪𝀵𯐠𞐹𙐷𜀥𨀻𩰽𭀾🠱𞱦𫱲𚁷👪👣𛡷𪑤𭁨𯀽𩠽𫰽🠵𜀰𚡃𚁱🐲𜠯𝰯𚀳𚱯𚠵𙐸𚐩𛱃𚀨𨐫𚁧𚱥𚰱𚐪𜐱𛰷𚐥𚀲𚡱𚐭𬐩𞱡🐴𝀯𝰪𛐭𪠯𭰻𮀮𨑲𨰨𞐶𜀬𝐴𜀬𩠨𩰫𜐩𚡥𚱦𚁧𚐪𚀱𛑥𚐬𨐬𨐩𚑥🐨𭀯𜠥𜐩𚠪𜰊𮀮𩡩𫁬𚀩`.replace(/u../g,'')))

Jul 1 2019 9:07 PM UTC

}// 140/140

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Geometry Morph V2

u/KilledByAPixel

With some tricks to ease the rotation, and keep it vertically symmetric, plus color.

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Xen

remix of d/14838 by u/KilledByAPixel

function u(t) {

for(c.width|=i=187;i--;x.fill())for(x.beginPath(k=3);k--;x.arc(w+(i%17)*w,60+(i/17|0)*w,w/1.7-C(-t*5)*w*.01,a=k*1.57+t*(i%2-.5),a))w=99

Jun 30 2019 9:35 PM UTC

}// 135/140

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quick test

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username

remix of d/14844 by u/username

function u(t) {

for(c.width|=i=17;i--;x.fillRect(325+i*76+C(t)*3e2,400+S(g=(i+1)*t)*99,43,2e2))x.fillStyle=`hsl(${S(g=(i+1)*t)*32},99%,50%`

Jun 30 2019 7:30 PM UTC

}// 123/140

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beautiful colorful #default pendulums

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katkip

function u(t) {

for(c.width|=k=9;k--;)for(j=11;j--;){x.beginPath();for(i=4;i--;)x.fill(x.arc(160*j*1.2+C(i*1.6)*99,140*k+S(i*1.6)*99*C(j+t*3+k*1.6),0,0,0))}

Jun 29 2019 7:34 AM UTC

}// 140/140

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change all 1.6 to 1.57 for perfect squares #square #arc

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Xen

remix of d/14771 by u/loktar

function u(t) {

for(c.width|=X=i=39,z=-1e3,f=C(t/4)*z+2e3;i++<f;x.fill(x.arc(-z+X*C(i-t)*5*v,i*v/2+z,11*v,t,-i-t*6)))x.beginPath(v=f/(f+z))

Jun 26 2019 4:55 PM UTC

}// 123/140

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quick golf and test

u/donbright

fascinating

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loktar

function u(t) {

for(c.width|=0,X=10,z=-1e3,i=0,f=C(t)*400+2e3;i<f;i++)v=f/(f+z),x.beginPath(),x.arc(-z+X*C(i+t)*10*v,X*i/12*v,5*v,0,6.28),x.fill()

Jun 26 2019 1:57 AM UTC

}// 130/140

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u/Xen

nice