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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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katkip

function u(t) {

x.fillStyle=`hsl(${t*99},99%,50%)`;if(t%5<.1)x.fillRect(0,0,2e3,2e3);x.drawImage(c,5,5,1910,1070);x.filter=`hue-rotate(${t/2}deg)`

May 16 2019 3:55 PM UTC

}// 130/140

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katkip

remix of d/13881 by u/katkip

function u(t) {

for(c.width|=i=9;i--;)x.filter=`blur(${5+C(t+i*9)*5}cm)`,x.fillRect(400+i*100+S(t)*300,400,50,200);

May 16 2019 3:46 PM UTC

}// 99/140

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katkip

function u(t) {

for(c.width|=i=9;i--;)x.filter=`invert(${50+C(i+t*9)*30}%) blur(${.3+C(t*2+i*1)*.3}cm)`,x.fillRect(400+i*100+S(t)*300,400,50,200);

May 16 2019 3:45 PM UTC

}// 130/140

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#default #blur

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metamero

function u(t) {

for(c.width|=i=36;i--;S(t*t)<0||x.fillText('GREVE',50+(i/9|0)*480,99+(i%9)*120))x.font='99px Arial'

May 16 2019 2:57 PM UTC

}// 99/140

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augusto de campos: ARTE LONGA VIDA BREVE ESCRAVO SE NÃO ESCREVE ESCREVE SÓ NÃO DESCREVE GRITA GRIFA GRAFA GRAVA UMA ÚNICA PALAVRA

u/katkip

um ok

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katkip

function u(t) {

c.width*=1;q=20-t>0?20-t:0;c.style.background='#000';x.fillStyle='lime';x.fillRect((t*1000)%1920,540+C(t*q+C(t*q+C(t*q)))*300,24,24)

May 16 2019 2:05 PM UTC

}// 132/140

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Person dying #heartbeat #pulse

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katkip

function u(t) {

eval(unescape(escape`挮睩摴株㴱㭦㴨堬夬朩㴾筸⹴牡湳污瑥⡘ⱙ⤬砮牯瑡瑥⡧⤬砮瑲慮獬慴攨ⵘⰭ天紻景爨椽㤻椭ⴻ⥸⹦楬汒散琨㐰〫椪㄰〫匨琩⨳〰ⰴ〰ⰵ〬㈰〩ⱦ⠴㔰⭩⨱〰⭓⡴⤪㌰〬㔰〬䌨琫昨㤶〬㔰〬匨琯㌩⨳⸱㐩⤯㈩`.replace(/u(..)/g,"$1%")))

May 16 2019 1:55 PM UTC

}// 139/140

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#beautiful to watch #default #rotation

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katkip

function u(t) {

eval(unescape(escape`挮睩摴株㴱㭦㴨堬夬朩㴾筸⹴牡湳污瑥⡘ⱙ⤬砮牯瑡瑥⡧⤬砮瑲慮獬慴攨ⵘⰭ天紻景爨椽㤻椭ⴻ⥸⹦楬汒散琨㐰〫椪㄰〫匨琩⨳〰ⰴ〰ⰵ〬㈰〩ⱦ⠴〰⭩⨱〰⭓⡴⤪㌰〬㐰〬䌨琪㤫椯㈩⼨㤫琪琪㤩⤻`.replace(/u(..)/g,"$1%")))

May 16 2019 1:49 PM UTC

}// 135/140

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c.width*=1;f=(X,Y,g)=>{x.translate(X,Y),x.rotate(g),x.translate(-X,-Y)};for(i=9;i--;)x.fillRect(400+i*100+S(t)*300,400,50,200),f(400+i*100+S(t)*300,400,C(t*9+i/2)/(9+t*t*9))

u/katkip

#default #coil #bounce #physics

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katkip

function u(t) {

eval(unescape(escape`焽ㄲ㠫䌨琩⨱㈸㭸⹦楬汓瑹汥㵒⡱ⱱⱱ⤻砮晩汬剥捴⠰ⰰⰲ攳ⰲ攳⤻景爨椽〻椼㤻椫⬩砮晩汬却祬攽刨⤬砮晩汬剥捴⠴〰⭩⨱〰⭓⡴⤪㌰〬㐰〬㔰ⰲ〰⤬砮捬敡牒散琨㐵〫椪㄰〫匨琩⨳〰ⰴ〰ⰵ〬㈰〩`.replace(/u(..)/g,"$1%")))

May 16 2019 1:37 PM UTC

}// 136/140

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#default

u/Xen

cool idea

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katkip

function u(t) {

eval(unescape(escape`𨰮𭱩𩁴𪀪🐱𞱩𩠨𘑴𚑻𬐽𦱝𞱦𫱲𚁩🐹𞐻𪐭𛐻𚑱𛡰𭑳𪀨𦱃𚁩𚡩𚐪𞐶𜀫𞐶𜀬𤰨𪐪𜠩𚠵𝀰𚰵𝀰𛀱𚱃𚁩𚐪𜑝𚑽𒡦𫱲𚁤𘁯𩠠𬐩𮱸𛡦𪑬𫁒𩑣𭀨𩁛𜁝𛁤𦰱𧐬𩁛𜡝𚠳𜀬𩁛𜡝𚠵𜀩𛁤𦰱𧐫👤𦰲𧐪𜠰𞱩𩠨𩁛𜑝🠱𞐲𜀩𩁛𜑝🐭𞐹𯐻`.replace(/u../g,'')))

May 16 2019 12:04 PM UTC

}// 130/140

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#falling #down #velocity #perspective

u/katkip

#infinite

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vinca

remix of d/13825 by u/vinca

function u(t) {

t||(x.globalCompositeOperation="xor",X=0),x.fillRect(X++,X,1,1),x[d='drawImage'](c,1,0),x[d](c,1,1),x[d](c,0,1),x[d](c,1,1)

May 16 2019 11:42 AM UTC

}// 123/140

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u/Xen

its good enough normal, but fullscreen... :-O