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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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ellisk1

function u(t) {

with(x)beginPath(q=(t+2)|0),fillStyle=R(a=33+q*3+q%2*89,a*.7-40),arc(960,540,z=q*20+S(j=t*9)*(10+q/3)+S(t)*9,j,j+50/z**.67),fill()

Sep 28 2018 2:26 AM UTC

}// 130/140

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Tree growth rings

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Purpzie

remix of d/4700 by u/mnt

function u(t) {

w=c.width=2e3;x.beginPath();for(i=0;i<w;)x.lineTo(1e3*S(2.1*i)+1e3,500*C(i++-t)+500);x.stroke()

Sep 27 2018 8:34 PM UTC

}// 96/140

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SuperFromND

remix of d/10124 by u/Xen

function u(t) {

for(c.width=i=2e3;i--;x.rotate(S(t-i)/5e1))x.fillRect(i,0,.4,2e3)

Sep 27 2018 4:14 PM UTC

}// 65/140

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Moire

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Xen

function u(t) {

for(c.width=i=2e3;i--;x.rotate(S(t-i)/5e2))x.fillRect(i,0,1,2e3)

Sep 27 2018 4:02 PM UTC

}// 64/140

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another 64 byter

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katkip

function u(t) {

c.width^=0;for(i=0;i<1080;i++)x.beginPath(),x.bezierCurveTo(0,i,540+S(i)*540,540+C(i)*t,1920,i),x.stroke()

Sep 27 2018 2:58 PM UTC

}// 106/140

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Simple visualization of wires sending data

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Purpzie

remix of d/10110 by u/Purpzie

function u(t) {

r={valueOf:Math.random}
x.fillStyle=`hsl(${t*100} ${25+r*75}%${25+r*25}%)`
x.fillRect(r*2e3,r*1e3,r*500,r*500)

Sep 27 2018 1:14 PM UTC

}// 110/140

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generative art

u/Purpzie

I ended up having to remove the bit that makes everything slowly fade away, but it still looks neat.

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katkip

remix of d/10018 by u/katkip

function u(t) {

c.width^=0;for(i=0;i<77;i++)for(j=0;j<44;j++)x.fillStyle=`hsla(${((j+t*10*t/4)<<(i+t*10*t/3))+t*10},99%,50%)`,x.fillRect(i*25,j*25,25,25)

Sep 27 2018 12:22 PM UTC

}// 137/140

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#infinite scrolling in this binary sequence

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Purpzie

function u(t) {

x.font='75px"',x.fillText(u+'',100,100)

Sep 26 2018 11:58 PM UTC

}// 39/140

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shortest #quine i can manage

u/joeytwiddle

Could change scale instead of font: x.scale(9,9),x.fillText(u+'',9,9)
u/Purpzie

@joeytwiddle you're right hmmmm

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Purpzie

function u(t) {

c.width=1000
for(i=0;i<100;i++){x.lineWidth=i*10+S(t*2)*75
x.beginPath()
x.moveTo(50+i*200,-50)
x.lineTo(i*14,800)
x.stroke()}

Sep 26 2018 5:15 PM UTC

}// 126/140

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zebra

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username

remix of d/10074 by u/Quant1um

function u(t) {

x.fillRect(t*99,S(t)*99+444,4,4)

Sep 26 2018 3:26 PM UTC

}// 32/140

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