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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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Purpzie

remix of d/10100 by u/Purpzie

function u(t) {

c.width=1e3
for(i=0;i<100;)with(x)lineWidth=i*10+S(t*2)*75,beginPath(),moveTo(50+i*200,-50),lineTo(i++*14,800),stroke()

Sep 27 2018 3:43 PM UTC

}// 119/140

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zebra but smaller

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katkip

remix of d/10120 by u/katkip

function u(t) {

c.width^=0;x.lineWidth=.1;for(i=0;i<1080;i++)x.beginPath(),x.bezierCurveTo(0,i,540+S(i*8)*540,540+C(i)/t*1e4,1920,i),x.stroke()

Sep 27 2018 3:02 PM UTC

}// 127/140

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You see different on fullscreen

u/joeytwiddle

fibrous

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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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katkip

remix of d/894 by u/iverjo

function u(t) {

i=frame;for(j=1080;j--;){a=b=0;for(k=35;k--&&a*a-b*b<4;)c=a*a-b*b+i/540-2,b=2*a*b+j/540-1,a=c;x.fillStyle=R(0,k);x.fillRect(i*2,j,C(k)*2,5)}

Sep 27 2018 2:24 PM UTC

}// 140/140

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Mandeldistort #mandelbrot #slow_render #scanline #fractal

u/katkip

#waitforit it actually gets better than I expected
u/joeytwiddle

Nice fresh style

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katkip

remix of d/5380 by u/ellisk1

function u(t) {

x.fillRect(0,0,q=c.width=2e3,q);for(i=q;i--;)r=40+i**4/8e7/t,x.fillStyle="#fff",x.fillRect(1e3+S(z=i%q*i+3e2*t/r)*r,1e3+C(z/i)*r-i,8,8)

Sep 27 2018 2:15 PM UTC

}// 135/140

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Golfed, minified and fastified

u/joeytwiddle

A like this one. Black hole -> tornado

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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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BalintCsala

function u(t) {

eval(unescape(escape`挮睩摴栽ⴱ㭣⹳瑹汥⹦楬瑥爽恩湶敲琨⑻⡴⬮㔩┲簰絠㭦潲⡪㴹㤻樭ⴻ⥸⹳整呲慮獦潲洨猽匨愽⵴⨱⸵㜩Ɽ㵃⡡⤬搬⵳Ⱘ䠽⠨琫⸵⤥㈼ㄩ⨱㠩⬨樥㄰ⴱ⭴┱⤪㌵Ⱘ樯㄰簰⤪㌵ⵈ⤬砮晩汬剥捴⠭ㄳⰭㄳⰲ㔬㈵⤻`.replace(/u(..)/g,"$1%")))

Sep 27 2018 8:41 AM UTC

}// 139/140

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Inspired by a beesandbombs tweet

u/katkip

This dweet is awesome!
u/Xen

impressive!
u/joeytwiddle

Lovely :)
u/joeytwiddle

#beesandbombs https://twitter.com/beesandbombs/status/1044…
u/asad123

nice

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yonatan

remix of d/10109 by u/Purpzie

function u(t) {

c.style.filter='invert(1';c.width=-1;for(i=50;i--;x.fillText(u,t*-33,2))x.setTransform(a=4+i*i/150,0,0,a,150,84),x.globalAlpha=1-(i/50)**.1

Sep 27 2018 2:30 AM UTC

}// 139/140

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u/joeytwiddle

Epic #quine
u/katkip

Genius
u/Purpzie

i'm just imagining this with the loud THX sound
u/magna

Whoa!
u/vain

stunning !!!

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cantelope

function u(t) {

eval(unescape(escape`景爨樽眽⡣⹷楤瑨㴱攳⤯㈬焽⠱⬱⼳⤪⨮㔻樭ⴻ砮扥杩湐慴栨砮獴牯步⠩⤩景爨椽㐻椭ⴻ⥚㴲㔫⠨瘽樯㌰簰⤭ㄴ⵴⨳┲⤪ㄮ㔫䌨瀽ㄮ〵⩩⤬堽⡪┳〭ㄵ⤪㈯焫⡶┲㼱⽱㨰⤫匨瀩ⱸ⹬楮敔漨眫堯娪眬㘯娪眭ㄵ〩`.replace(/u(..)/g,"$1%")))

Sep 27 2018 2:16 AM UTC

}// 139/140

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https://dweet.net/315/10113