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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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KilledByAPixel

remix of d/15766 by u/KilledByAPixel

function u(t) {

for(I=O="";q="𠑣𹃦񚁉񪤥񐒬񲆥򁓢򉘄񤖂񓇄򙒊򡂅𼢏򋨢򪙅򱂪𲒅𣧥򑅑񰤌򁇥򃙅񚂅𥒪񊒤򰓎𢢦𛵍񫄥𠑊񹑊񱘄𸤃񔆩񒗄򫂅𫢶𚕈󂔥𱺅񓪗𸠯񣒬񻲮𦊅𣉦򉘄񤖂𳂪𳴐󛦅𱅮".charCodeAt(I/2);O+=";helo dwitr!sancmpf.uvyqbg"[q>>I++%2*5&31]);throw(O)

Sep 23 2019 5:23 PM UTC

}// 140/140

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New 4-1 compressor proof of concept! In this example the compressed code is 208 chars.

u/KilledByAPixel

#COMPRESSOR replace $ with your code... $="for(c.width|=i=9;i--;)x.fillRect(400+i*99+S(t)*300,400,50,200)";n=[...new Set([...(';'+$)])].join(o='');for(v=i=0;(q=$[i])||i%4;++i)v+=q?n.indexOf(q)<<i%2*5:0,i%2?(o+=String.fromCharCode(((i%4==3?55:54)<<10)+v),v=0):0;throw 'for(I=O="";Q="'+o+'".charCodeAt(I/2);O+="'+n+'"[Q>>I++%2*5&31]);eval(O)'
u/tomxor

This is way better than my crazy delta compressor, but it's still surprisingly difficult to stick to a 32 char set.

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robbyg

function u(t) {

for(i=2304,Z=30;i--;x.fillRect(H*Z,V*Z,Z,Z))H=i%64,V=i/64|0,x.fillStyle=R(a=T(C(H)-S(V)-t*2)>0&&Math.random()>.8?255:128,0,0,.05)

Sep 17 2019 8:01 PM UTC

}// 129/140

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Lava

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camel_case

remix of d/12746 by u/camel_case

function u(t) {

l={}
p=.01
r+=.005
for(i=0;i<10;l[i++%6]=p+=r*p*(1-p)){}
for(j=0;j<6;)x.fillRect(t*120,850-l[j++]*540,2,2)}var r=0
{

Sep 17 2019 2:55 PM UTC

}// 116/140

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Somewhat shorter and cleaner logistics map

u/camel_case

https://www.youtube.com/watch?v=ETrYE4MdoLQ

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camel_case

function u(t) {

x.beginPath(n+=g[p+=g[p-n]||p<n?n:-n]=9)
x.arc(q+p,540,Math.abs(p-q),h*n,h*n+h)
x.stroke()
q=p
}{var n=p=q=f=0,g={},h=Math.PI

Sep 17 2019 12:12 PM UTC

}// 125/140

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The Recamán Sequence

u/camel_case

https://www.youtube.com/watch?v=FGC5TdIiT9U&…
u/MAxSaL

I like your name ;-)

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jlidbeck

function u(t) {

s=200
c.width=s*4
x.translate(s+s,s)
for(j=49;--j;)for(i=49;--i;)u=C(t+i)*S(j),v=C(t+i)*C(j),w=S(t+i),x.fillRect(s*(C(t)*u+S(t)*w),s*v,1,1)

Sep 13 2019 11:59 PM UTC

}// 139/140

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jlidbeck

remix of d/15668 by u/mildlybean

function u(t) {

for(i=c.width=1000;i-=20;)for(j=960;j-=20;)z=S(i/55-C(j/55+t))*S(j/55+t/2-C(i/55))*9+9,x.fillRect(i,j,z,z)

Sep 11 2019 10:47 PM UTC

}// 106/140

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django

remix of d/15682 by u/django

function u(t) {

with(x){w=c.width*=1;w/=2;h=540;
for(i=0;i<920;i++){a=(S(t+i+C(t-i+S(t+i)))+1)*w;b=(C(t-i+S(t+i+C(t-i)))+1)*h;
fillRect(a-5,b-5,10,10)}
}

Sep 10 2019 11:11 PM UTC

}// 137/140

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twisted

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Xen

function u(t) {

t?x.drawImage(c,C(t),S(t)):c.width=59
x.strokeStyle="#"+frame
x.strokeText("Not Gone",9,19)

Sep 8 2019 11:19 PM UTC

}// 91/140

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aggoetey

function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<7;i++)
x.fillRect(400+i*100+S(t)*300,400+C(t)*i*65,S(t)*50+15,200)

Sep 8 2019 11:10 AM UTC

}// 109/140

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u/Xen

nice
u/Xen

look at the code on other dweets for ideas on shrinking your code, give you more room to add extra x
u/lionleaf

#default Nice one

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rodrigo.siqueira

remix of d/15630 by u/taupelink

function u(t) {

if(t<5)for(i=d=e=f=5e3;i--;x.fillRect(d*z,e*z,1,1))[d,e,f]=[(r=Math.random(z=99)*z|3)/5-2/(.5+r%3)*C((d-r)*22)*1,.8*r%15-6*S(1/S(d))/f,d]

Sep 6 2019 12:49 PM UTC

}// 137/140

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Geometric gradients