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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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taupelink

function u(t) {

w=1920;h=1080;for(i=99;i--;){X=(r=Math.random)()*w,Y=r()*h
x.fillStyle=`hsl(${X/6-99*t%360},90%,${Y/12}%,.1)`
x.fillRect(X,h-Y,s=r()*99,s)}

Jun 15 2019 6:11 PM UTC

}// 139/140

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hsl color rotation with random rectangles

u/joeytwiddle

Stains: w=1920;h=1080;r=Math.random;for(i=99;i--;)X=r()*w,Y=r()*h,x.fillStyle=hsl(${X/6+999*t},90%,${Y/21+20}%,.013),x.fillRect(X,h-Y,s=r()*300,s)

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katkip

function u(t) {

eval(unescape(escape`𨰮𭱩𩁴𪀪🐱𞱩𩠨𘑴𚑻𮠽𦱝𞱦𫱲𚁩🐴𜀻𪐭𛐾𛐴𜀻𚑦𫱲𚁪🐴𜀻𪠭𛐾𛐴𜀻𚑺𛡰𭑳𪀨𮱸𞡩𛁹𞡪𯐩𯐊𩡯𬠨𬐠𫱦𘁺𚑸𛡦𪑬𫁒𩑣𭀨𚁱𛡸𚰽𤰨𬐮𮐪𭀯𜰩𚐪𞐫𞐶𜀬𝐴𜀫𚁱𛡹𚰽𠰨𬐮𮀪𭀯𜰩𚐪𞐬𝐬𝐩`.replace(/uD./g,'')))

Jun 15 2019 10:46 AM UTC

}// 119/140

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#chaos

u/katkip

cat horse horse

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katkip

function u(t) {

eval(unescape(escape`𨰮𭱩𩁴𪀪🐱𞱩𩠨𘑴𚑻𮠽𦱝𞱦𫱲𚁩🐹𞐻𪐭𛐻𚑦𫱲𚁪🐹𞐻𪠭𛐻𚑺𛡰𭑳𪀨𮱸𞡩𛁹𞡪𯐩𯐊𩡯𬠨𬐠𫱦𘁺𚑸𛡦𪑬𫁒𩑣𭀨𜠰𜀫𚁱𛡸𚰽𤰨𬐮𮐯𜠹𚡴𚐩𚠹𛀱𜀰𚰨𬐮𮐫👓𚁱𛡸𛰲𞐪𭀩𚐪𝰬𝠬𝠩`.replace(/uD./g,'')));

Jun 15 2019 10:14 AM UTC

}// 117/140

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It is beautiful.

u/katkip

#chaos

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taupelink

function u(t) {

x.fillRect(0,0,w=2e3,w);f=A=>x.clearRect(...A);f([0,0,w,400]);for(i=52;i--;){f([i*50-300+S(t)*300,i+1&1&&i<31&&i>13?600:400,50,680])}

Jun 13 2019 4:00 AM UTC

}// 133/140

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all negative space #default

u/taupelink

If you're seeing artifacts, you can insert "|0" to the right of S(t)*300

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KilledByAPixel

remix of d/14546 by u/KilledByAPixel

function u(t) {

c.width|=0
with(x)font="87em'",lineTo(X=960,Y=540),arc(X,Y,2e3,t,t+2),clip(lineTo(X,Y)),lineWidth=9,stroke(),fillText("𝗥𝗔𝗗𝗔𝗥",9,1e3,1850)

Jun 12 2019 5:20 PM UTC

}// 137/140

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RADAR

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username

remix of d/5321 by u/hoplite

function u(t) {

i=c.width=96;for(;i--;)for(k=54;k--;)x.fillStyle=`hsl(${(S(i/9+(j=t+(k-i)/99))*S(k/7)+S(k/9+j)*S(i/7-j))*255},99%,50%)`,x.fillRect(i,k,1,1)

Jun 11 2019 9:06 AM UTC

}// 139/140

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#randomremix no 8 - distorted

u/donbright

#plasma
u/katkip

Awesomed!

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taupelink

function u(t) {

C=100
c.width|=0
for(i=9;i--;)x.fill(new Path2D(`M${C*(4+i+3*S(t))} 400 h50 v${2*C} h-50 v${-2*C}`))

Jun 9 2019 9:57 PM UTC

}// 101/140

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#default with #path2D

u/katkip

nice
u/taupelink

Notes: The v${-2*C} at the end can be omitted. I regret my choice of "C" for a variable name--that's cosine :)

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KilledByAPixel

remix of d/14501 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`琪㴴㭣⹷楤瑨簽〻景爨椽砮汩湥坩摴栽㄰㭩ⴭ㭸⹳瑲潫攨瀩⥱㵃⡴╍慴栮偉⤬砮晩汬⡰㵮敷⁐慴栲䐨砮晩汬却祬攽恨獬⠴㤠㤹┤笵〫㈵⩱紥怩Ɒ⹥汬楰獥⠹㘰⬨椭㐩⩱⨹ⰵ㐰Ⱘ匨琩⨪㈩⨪⸵⨴〰⬱ⰴ〰ⰰⰰⰷ⤩`.replace(/u(..)/g,"$1%")))

Jun 9 2019 4:52 AM UTC

}// 140/140

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Spinning Coin with Lighting #D3

u/katkip

Realistic

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pavel

remix of d/14464 by u/katkip

function u(t) {

for(x.setTransform(1,0,0,1,960,540),x.rotate(S(2*t)),i=200;i--;x[j?'fillRect':'clearRect'](r=(18+j)*(i&-2),r,r*=C(t)*.7-2,r))j=i%2

Jun 7 2019 5:01 AM UTC

}// 130/140

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#d3 #perspective #pyramid

u/pavel

Am I crazy or do the sides rainbow a little?
u/katkip

It's an illusion maybe
u/joeytwiddle

Could be the way your machine talks to the monitor? https://en.wikipedia.org/wiki/Subpixel_rende… Or could be you are crazy!

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metamero

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚑦𫱲𚁩🐭𜐬𩡯𫡴🐢𜰲𜁰𮀠𠑲𪑡𫀠𠡬𨑣𪰢𞱩𚰫🀹𞐻𭀿𜀺𪐦𙡩🀴🱩𧠳🱦𪑬𫁔𩑸𭀨𪑞𜐿𘡹𩑬𫁯𭰢𞠢𪑬𫁵𬱯𬡹𘠬𞐹𛁩𚠴𜠰𚐺𬡯𭁡𭁥𚀮𝰸𝐩𞡦𪑬𫁒𩑣𭀨𪐪𜠳𛐹𞐬𛐲𩐳𛁩🰱𜰺𜡥𜰬𝁥𜰩𚑦𪑬𫁓𭁹𫁥👩🱩🠳🰢𘱆𡡆𘠺𘠣𝐵𝐢𞠢𘰰𜁆𘠻`.replace(/u../g,'')))

Jun 5 2019 9:02 PM UTC

}// 139/140

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"Illusory yellow distortion" by Akiyoshi Kitaoka

u/metamero

"If observers approach or move away from the image fixating at the center, then the words appear to be distorted."
u/metamero

uncompressed: with(x)for(i=-1,font="320px Arial Black";i++<99;t?0:i&&i<4?i^3?fillText(i^1?"yellow":"illusory",99,i*420):rotate(.785):fillRect(i*23-99,-2e3,i?13:2e3,4e3))fillStyle=i?i>3?"#FFF":"#555":"#00F";
u/metamero

#illusion #opticalillusion
u/metamero

d/14455 animated version