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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/3219 by u/bromingo

function u(t) {

for(Z=i=c.width=280;--i;)for(j=d=10;j-->2;x.fillRect(i,Z-y,2,y))y=40*j**.8+80/j*C(d*t/j-i/40),x.fillStyle=R(Z-15*j,0,Z)

Sep 29 2017 7:32 PM UTC

}// 119/140

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i see tha sea!

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alech

function u(t) {

a=255;x.filter="blur("+S(t)*30+"px)";for(i=0;i<9;i++){
x.fillStyle=R(C(t*7)*a,0,(t*17)%a);x.fillRect(a+i*t*10,40*i+t*15,a*T(t),a+350*C(t))}

Sep 28 2017 7:55 PM UTC

}// 139/140

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btc@codebro.com

function u(t) {

c.width=1920;
x.fillStyle=R(0, 180, 220, .05)
for(i=0;i<12;i++)
for(j=0;j<12;j++)
  x.fillRect(S(i*t/2)*400+960, C(i*t/2)*400+540, 50, 50)

Sep 23 2017 8:49 PM UTC

}// 138/140

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Xen

remix of d/3189 by u/Xen

function u(t) {

t?d=x.getImageData(0,0,Z,Z):Z=c.width=200
for(i=9e4;i--;d.data[i]=(i-3)%4?159:159+d.data[i-(4*frame%Z)]%Z);x.putImageData(d,0,0)

Sep 22 2017 7:56 PM UTC

}// 128/140

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W'T'Fx!

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alien

remix of d/3185 by u/alien

function u(t) {

with(x){c.width=500;v=(X,Y,R)=>[20*C(X+t)*R+250,20*S(Y+t)*R+150]
for(i=0;i<200;i++)lineTo(...v((4.112)*i,4.112*i,0.5*i*S(t/i)));stroke()
}

Sep 21 2017 2:38 PM UTC

}// 138/140

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Let it spiral and hang on it's gonna be a wild trip.

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alien

function u(t) {

with(x){c.width=500;v=(X,Y,R)=>[20*C(X+t)*R+250,20*S(Y+t)*R+150]
for(i=0;i<200;i++)lineTo(...v((4.112)*i,4.112*i,8*S(t/i)));stroke()
}

Sep 21 2017 2:32 PM UTC

}// 134/140

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We are all surrounded by orbiting spirals of energy.

u/joeytwiddle

Wow how did you make my whole room spin?

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Xen

function u(t) {

x.beginPath(N=500),x.arc(900+S(t/(S(t)+9))*N,N+C(t/(C(t)+7))*N,50,0,7),x.stroke(),x.strokeStyle=R(t*9%N,0,t*N%N,C(t/2)+1.1)

Sep 20 2017 6:07 PM UTC

}// 123/140

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kinda just wanders till it makes a square lol

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Xen

remix of d/3145 by u/schastlilya

function u(t) {

x.fillStyle='#'+frame;x.fillRect(C(t)+960,S(t)+540,C(t)*960,S(t)*540);

Sep 3 2017 6:23 PM UTC

}// 70/140

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schastlilya

function u(t) {

x.clearRect(0,0,1920,1080);x.fillRect((C(t)*960+(960*t))/t,0,100,S(t)*500+500);

Aug 30 2017 12:45 PM UTC

}// 79/140

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I'm back 8-)

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kchplr

function u(t) {

f=frame
'<~ËË~<'.charCodeAt(f/8|0)&1<<f%8|0&&x.fillRect((f/8|0)*9,f%8*9,9,9)

Aug 24 2017 3:27 PM UTC

}// 78/140

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A work in progress, I guess ?

u/joeytwiddle

Cute :D f>>3 could save you two chars
u/kchplr

joeytwiddle: good call, it will also definitively help when I'll move to multi-bytes characters
u/Xen

did you a remix ;)