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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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Xen

remix of d/11232 by u/katkip

function u(t) {

t||(b=a=0);for(p=99;p--;x.fillRect(a*9,b*9,9,a++>192?(b++,a=-1):p))x.fillStyle=`hsl(${(b%a^a%b)*t} 99%${a^b}%)`

Dec 1 2018 7:03 PM UTC

}// 111/140

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jylikangas

remix of d/11211 by u/jylikangas

function u(t) {

eval(unescape(escape`景爨挮睩摴栽椽ⴱⱸ⹳桡摯睂汵爽㌰㭩⬫㰹㐻硛晝⡹ⴹ㤬椦☸㘬猽椿㤺ㅥ㌬猫匨椫瑞㤩⨲〭㌲⤩爽椼㤿䌨㐯椩⨹㤺椫匨椪琩ⱸ⹳桡摯睃潬潲㵸⹦楬汓瑹汥㵒⡲⨴ⰰⱲ⨹⤬硛昽❦楬汒散琧崨ㄵ〭爬礽椪㤬爪㈬椭㠩`.replace(/u(..)/g,"$1%")))

Dec 1 2018 6:11 PM UTC

}// 140/140

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Synthwave Dreams

u/katkip

Wow

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ceaga

function u(t) {

w=255
c.width=w*3
x[c='fillStyle']=R(w,0,0,2)
x[f='fillRect'](0,t*w,w,w)
x[c]=R(0,w,0,2)
x[f](w,t*w,w,w)
x[c]=R(0,0,w,2)
x[f](w*2,t*w,w,w)

Dec 1 2018 3:40 PM UTC

}// 138/140

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Hello World, first try, simple drawing. Color bar.

u/Xen

good job, look at other dweets for ideas and tricks, also check out the dwitter dicord, plenty about to help

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katkip

remix of d/11231 by u/katkip

function u(t) {

t||(a=-1,b=0);for(p=69;p--;)x.fillStyle=`hsl(${(b%a+a%b)*frame/3} 99%${50+S(a**b)*10}%)`,x.fillRect(a*10,b*10,10,10),a++,a>192?(b++,a=-1):0;

Dec 1 2018 1:54 PM UTC

}// 140/140

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Visual #illusion . If you move your eyes, this moves too.

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katkip

remix of d/11230 by u/katkip

function u(t) {

t||(a=-1,b=0);for(p=69;p--;)x.fillStyle=`hsl(${(a**5+b**5)**.5} 99%${50+S(a*b)*10}%)`,x.fillRect(a*10,b*10,10,10),a++,a>192?(b++,a=-1):0;

Dec 1 2018 1:49 PM UTC

}// 137/140

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katkip

function u(t) {

t||(a=-1,b=0);for(p=50;p--;)x.fillStyle=`hsl(${(a|b)**2+frame*999} 99%${50+T(a|b)*20}%)`,x.fillRect(a*10,b*10,10,10),a++,a>192?(b++,a=-1):0;

Dec 1 2018 1:44 PM UTC

}// 140/140

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#sierpinski #epilepsy

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katkip

function u(t) {

q=(A,C)=>{x.fillStyle=C,x.fillRect(0,0,A,S(t)*1080)};q(1920,'#f00');q(1920/3*2,'#ff0');q(1920/3,'#00f');x.drawImage(c,-5,-2,1930,1090)

Dec 1 2018 1:00 PM UTC

}// 134/140

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Happy Great Union Day 2018 in Romania! #flag

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katkip

function u(t) {

c.style.background='#000';x.shadowColor='lime';for(i=0;i<99;i++)x.fillRect(S(i+t/5)*i*100,400+T(i*10+t)*400,50,50),x.shadowBlur=T(t/99+i)*30

Dec 1 2018 12:48 PM UTC

}// 140/140

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Matrix Wires #d3

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jylikangas

function u(t) {

eval(unescape(escape`景爨硛昽❦楬汒散琧崨〬〬眽挮睩摴栽椽㌰〬眩㭩ⴭ㭸学崨㔹ⵓ⡡㵩⼹〩⨱㐬㈰⭃⡡⤪㤬㤬⸱⤬硛晝⠱㔰⬨椥㠭㐩⩺ⰵ〫稬樥㌿ㄺ稬ⅸ学崨椬㐵⭓⡩⼱㤩⨹ⰱⰱ⤩⥪㵩㸾㌬稽眯⡪⵴┱⨶⤬砮晩汬却祬攽∣づ㠹∻`.replace(/u(..)/g,"$1%")))

Dec 1 2018 12:37 PM UTC

}// 140/140

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Moonlight Zone

u/katkip

Awesome
u/aleamb

dude!!!
u/Xen

Nice one :-)

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veubeke

function u(t) {

eval(unescape(escape`䴽䵡瑨⹲慮摯活琦♲㰱㔰☡䐮獯浥⡤㴾䵡瑨⹨祰潴⡤⹰⵰Ɽ⹱⵱⤼搮爫爫㤩㽲⬽㈺瀽䴨䐽琿嬮⸮䐬筰ⱱⱲ絝㩛崬焽䴨爽〩⨱〸〩⨱㤲〻砮晩汬却祬攽刨㈵㔭爩ⱸ⹦楬氨倽湥眠偡瑨㉄ⱐ⹡牣⡰ⱱⱲⰰⰷⰰ⤩`.replace(/u(..)/g,"$1%")))

Dec 1 2018 11:39 AM UTC

}// 137/140

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#circles

u/veubeke

Uncompressed: M=Math.random;t&&r<150&!D.some(d=>Math.hypot(d.p-p,d.q-q)<d.r+r+9)?r+=2:p=M(D=t?[...D,{p,q,r}]:[],q=M(r=0)*1080)*1920;x.fillStyle=R(255-r),x.fill(P=new Path2D,P.arc(p,q,r,0,7,0))
u/magna

#waitforit
u/magna

Awesome!
u/magna

TIL: Math.hypot()
u/Xen

my Anti-OCD wants just one circle to touch :P