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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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Agnes

function u(t) {

with(x)A=a=>Math.random()*31|0,B=0|A()/8,setTransform(4,0,0,4,A()*64,A()*36),rotate(1.57*B),clearRect(-8,R=-4.5,16,9),B&&fillRect(-7,R,14,9)

Jan 7 2019 2:55 PM UTC

}// 140/140

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Alien robot factory V2

u/Agnes

Massive props to JWinslow in the Discord for doing almost all of the golfing! The last 15 or so characters were removable because 1.57 is an OK approximation of Pi/2 and because the dimensions were scalable by four in the transform.
u/DataMeta

This one's fun

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NullifiedWarp

remix of d/11679 by u/NullifiedWarp

function u(t) {

c.width=1920 // clear the canvas
x.fillStyle=R(255,215,0)
for(i=0;i<2000;i++)
x.fillRect(C(i+t)*300+900,600+S(t+i)*200,5,100*S(t-i*9)-200)

Jan 7 2019 2:47 PM UTC

}// 138/140

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Burning Ring

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NullifiedWarp

function u(t) {

c.width=1920 // clear the canvas
x.fillStyle=R(255,215,0)
for(i=0;i<2000;i++)
x.fillRect(C(i)*400+900,400+S(t+i)*300,5*S(t),200)

Jan 7 2019 1:31 PM UTC

}// 128/140

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Invisibility ring? idk first dweet.

u/JWinslow23

One Ring to rule them all...
u/lionleaf

#gold #ring #lotr #one_ring :) Welcome! Great first dweet #first_dweet

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metamero

remix of d/11675 by u/metamero

function u(t) {

eval(unescape(escape`眽挮睩摴桼㴰㭆㴨瀬焬爬猬洩㴾砮晩汬⡐㵮敷⁐慴栲䐬倮慲挨瀪眬焪眪⸵㘬㤪洬〬㜩⥼籛瀫㴨爭⸵⤯㜹ⱱ⬽⡳⴮㔩⼹㤬爬猬浝㭍㴨琿䴺嬮⸮䅲牡礨眩崩⹭慰⡶㴾琿䘨⸮⹶⤺䘨潮捬楣欽牥獥琩⹭慰⡍慴栮牡湤潭⤩`.replace(/u(..)/g,"$1%")))

Jan 7 2019 1:05 PM UTC

}// 140/140

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click to reset

u/joeytwiddle

#particles

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ThirdEstate

function u(t) {

c.width=1920;for(i=0;i<1e3;i++){x.fillRect(950+C(t+i*9/6)*1e3,550+S(t+i*1.6)*700,10,80*S(t)*3);x.fillStyle=R(50+S(i)*70,0,100,1)}

Jan 7 2019 6:11 AM UTC

}// 129/140

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u/katkip

...

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metamero

remix of d/11674 by u/metamero

function u(t) {

eval(unescape(escape`瑼簨夽欽㐸〬洽堽㈪欬渽瀽焽㐬潮浯畳敭潶攽攽㹻昽㐪欯楮湥牗楤瑨㭘㵦⩥⹸㭙㵦⩥⹹紬潮捬楣欽牥獥琩㭡㵘⵭㭢㵙⵮㭤㵡⩡⭢⩢㭲㴱⴮㤯搻搯㵫㭰⬽愯搬焫㵢⽤㭸⹬楮敔漨洫㵰⨽爪㵤㸱Ɱ⬽焪㵲⤻砮獴牯步⠩`.replace(/u(..)/g,"$1%")))

Jan 7 2019 4:34 AM UTC

}// 140/140

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#interactive!! easier : decaying drawing orbits : initial conditions set to a impressive drawing #waitforit : or : move #mouse to change atractor : click to reset : #gravity #orbit

u/joeytwiddle

Very nice! #physics

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metamero

remix of d/11672 by u/metamero

function u(t) {

eval(unescape(escape`瑼簨洽堽夽欽㐸〬瀽渽焽㘬潮浯畳敭潶攽攽㹻昽㐪欯楮湥牗楤瑨㭘㵦⩥⹸㭙㵦⩥⹹紬潮捬楣欽牥獥琩㭡㵘⵭㭢㵙⵮㭤㵡⩡⭢⩢㭰⬽愯搪欬焫㵢⽤⩫Ⱳ㴱ⴱ⽤㭸⹬楮敔漨洫㵰⨽爪㵤㹫⼲Ɱ⬽焪㵲⤻砮獴牯步⠩`.replace(/u(..)/g,"$1%")))

Jan 7 2019 2:54 AM UTC

}// 138/140

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decaying orbits : move #mouse to change atractor : click to reset : #interactive : #gravity #orbit + "air" resistance + target "landing"

u/metamero

#waitforit

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JWinslow23

remix of d/11668 by u/Agnes

function u(t) {

eval(unescape(escape`睩瑨⡸⥁㵡㴾䵡瑨⹲慮摯洨⤪㐰簰ⱂ㴰籁⠩⼸ⱳ整呲慮獦潲洨ㄬ〬〬ㄬ䄨⤪㐸ⱁ⠩⨲㜩Ⱳ潴慴攨䵡瑨⹐䤪䈯㈩Ᵽ汥慲剥捴⠭㈴Ⱝㄳ⸵ⰴ㠬㈷⤬䈦♦楬汒散琨ⴲ〬ⴱ㌮㔬㐰ⰲ㜩`.replace(/u(..)/g,"$1%")))

Jan 6 2019 11:13 PM UTC

}// 124/140

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Alien robot factory (golfed a bit more, but not enough)

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metamero

function u(t) {

eval(unescape(escape`瑼簨堽夽洽⸵Ɱ㵰㵱㴮㜬潮浯畳敭潶攽攽㹻堽攮砯楮湥牗楤瑨㭙㵥⹹⽩湮敲䡥楧桴紬潮捬楣欽牥獥琩㭡㵘⵭㭢㵙⵮㭤㵡⩡⭢⩢㭰⬽愯㵤⨽㤹㭱⬽戯㵤㭭⬽瀯㤹㭮⬽焯㤹㭸⹦楬汒散琨洪挮睩摴栬渪挮桥楧桴ⰹⰹ⤻`.replace(/u(..)/g,"$1%")))

Jan 6 2019 8:43 PM UTC

}// 140/140

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gravity : #gravity towards #mouse : move mouse to change atractor : click to reset : #interactive

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anotherkitten

function u(t) {

for(c.width|=i=0;i<108;i++)
for(j=0;j<108;j++)
if((t+Math.hypot(i,j))%2.1<1)
x.fillRect(i*10,j*10,10,10)

Jan 6 2019 8:29 PM UTC

}// 104/140

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very odd effect