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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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BirdsTweetCodersDweet

function u(t) {

for(c.width|=i=400;i--;)x.fillStyle=`hsl(${t*90*i%100},50%,50%)`,x.fillRect(50*(i%40),(i/40|0)*99+(i%2)*50,C(t)*50-S(t),50)

May 3 2018 10:52 PM UTC

}// 123/140

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Spinning rainbow squares

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E-Mouse

remix of d/7887 by u/E-Mouse

function u(t) {

let X,Y 
for(X=240;X--;)for(Y=135;Y--;x.fillRect(X*16,Y*16,16,16))x.fillStyle=R(r=X*t*2&Y*t*2,0,r^(20))

May 3 2018 8:35 PM UTC

}// 103/140

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BuRRak

function u(t) {

x.fillRect(0,0,2e3,2e3)
R=Math.random
r=!t?[...Array(150)].map(V=>[R()*2e3,R()*2e3]):r
for(d of r)x.clearRect(d[0],d[1]=(d[1]+4)%2e3,9,9)

May 3 2018 12:15 PM UTC

}// 137/140

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trancor

function u(t) {

eval(unescape(escape`眽挮睩摴栽㘰〻ⅴ☦⡹㵛崬甽孝⤻景爨椽㤹㭩ⴭ㬩欽祛楝╷籼眬漽畛楝╷籼匨椩Ɱ㴱Ɑ㵩┶ⴲⱹ⹭慰⠨戬愩㴾筤㵢⵫ⱶ㵵孡崭漬䵡瑨⹳煲琨搪瘩㰵〦☨渭㵤⼹〬洭㵶⼹〩紩ⱸ⹦楬汒散琨祛楝㵫⭮Ⱶ孩崽漫洬㤬㤩`.replace(/u(..)/g,"$1%")))

May 2 2018 11:09 PM UTC

}// 140/140

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Tried so hard and failed to get this working - h=(w=c.width=600)/2;!t&&(y=[],u=[]);for(i=99;i--;)k=y[i]||w/2,o=u[i]||h/2,n=C(i),m=S(~i),y.map((b,a)=>{d=b-k,v=u[a]-o,Math.sqrt(d*d+v*v)<50&&(n-=d/80+S(t),m-=v/80)}),x.fillRect((y[i]=(k+n+w)%w)/.9-9,(u[i]=(o+m+h)%h)/.8-9,6,6) Thanks u/MrM@_S for inspiration to look into obfuscation and cheating the char count ;)

u/trancor

Been seeing an error variable u undefined sometimes, just add a space after the last ), it will work then.

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BirdsTweetCodersDweet

function u(t) {

testing comments, ignore

Apr 29 2018 3:46 PM UTC

}// 25/140

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BirdsTweetCodersDweet

function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<~~t%8+1;i++)
x.fillRect(400+i*100+S(t)*300,400,50,200) // draw 50x200 rects

Apr 29 2018 3:06 PM UTC

}// 118/140

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Heh... #default

u/Lazy1337

#fabric I guess.
u/BirdsTweetCodersDweet

fabric??

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Agnes

remix of d/7842 by u/Agnes

function u(t) {

for(c.width|=i=9,a=t;i--;x.setTransform(1,0,-S(a+=S(i*t+35*i)/10)/5,1,100*(4+i),400),x.fillRect(300*S(t),200,50,-200));

Apr 29 2018 8:44 AM UTC

}// 119/140

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This one looks more like they're hanging from the top and moving around is making them shake.

u/Agnes

#default

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anthonylewis

function u(t) {

p=6.2832;a=32;r=1000;for(c.width|=i=0;i<a;i++)
z=p/a*i*t,x.moveTo(960,540),x.lineTo(r*S(z)+960,r*C(z)+540),x.stroke()

Apr 27 2018 2:03 AM UTC

}// 118/140

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Windmills

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karacasoft

function u(t) {

if(t==0)x.translate(c.width/2,c.height/2)
x.rotate(0.0513)
a=S(t/3)*255
x.fillStyle=R(a,0,0,1)
x.fillRect(500+S(t)*500,400 + S(2*t)*400,9,9)

Apr 26 2018 2:13 PM UTC

}// 140/140

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function u(t) {

p=800+C(t*5)*t*11
q=500+S(t*3)*t*6
x.arc(p, q, 5, 0, Math.PI * 2, true)
x.stroke()

Apr 25 2018 9:32 AM UTC

}// 84/140

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