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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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acorv

function u(t) {

eval(unescape(escape`挮睩摴栽㤹⬲㔰⨨匨琩⬱⤻愽䌨琪㈩⨹㤻戽匨琪㈩⨹㤻睩瑨⡸⥻瑲慮獬慴攨愭㤹Ɫⴹ㤩㭦潲⡩㴭〻椼㤹㤻⥢敧楮偡瑨⠩ⱦ楬汓瑹汥㵠桳氨⑻琪楽ⰷ〥ⰵ〥怬慲挨⠨椯㈰⥼〩⨳㈬㌰⨨椫⬥㈰⤬ㄵⰰⰷ⤬晩汬⠩紻`.replace(/u(..)/g,"$1%")))

Sep 18 2018 9:29 PM UTC

}// 139/140

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c.width=99+250*(S(t)+1);a=C(t*2)*99;b=S(t*2)*99;with(x){translate(a-99,b-99);for(i=-0;i<999;)beginPath(),fillStyle=hsl(${t*i},70%,50%,arc(((i/20)|0)*32,30*(i++%20),15,0,7),fill()}

u/acorv

Any help golfing this one will be appreciated!

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robbyg

remix of d/9917 by u/THORinHOOD

function u(t) {

c.width=q=1920;for(i=q;i-=16;)x.fillStyle=`hsl(${C(t+i)*360},80%,70%`,x.fillRect(0,i,k=Math.abs(S(t)*q),8),x.fillRect(q-k,i+8,q,8)

Sep 18 2018 7:37 PM UTC

}// 130/140

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Now with rainbow!

u/Xen

nice style

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Noah

function u(t) {

[99,300,S(t*88)*99+200].map(r=>x.fillRect(850+S(t)*r+(f=~~t%3-1)*250,350+C(t)*r+Math.abs(f)*400,5,5))

Sep 18 2018 7:34 PM UTC

}// 101/140

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Not the same as previous, but went from 162 to 101, again huge thanks to u/yonatan

u/Noah

How to codegolf "101" course
u/username

#waitforit

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Noah

function u(t) {

n=t*999;for(i=1e3;i--;){t=n+i/60;v=(t*3%3|0)+1,p=f=>f(t)*v*99+f(~~t%3*2.1)*250+(v-2?0:f(t*22)*99);x.fillRect(960+p(S),520+p(C),5,5)}

Sep 18 2018 7:31 PM UTC

}// 132/140

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#codegolfing is awesome u/yonatan got the last 162 to 132

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katkip

remix of d/9915 by u/katkip

function u(t) {

c.width*=1;x.translate(960,540);
for(i=0;i<100;i++)
x.fillRect(i+S(t/99)*300,-1e3,5,C(S(t))*2e3),x.rotate(t/99)

Sep 18 2018 5:52 PM UTC

}// 111/140

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andrey.pro7k

function u(t) {

eval(unescape(escape(`挮睩摴栽ㄹ㈰㭨㴱〰㭦潲⡩㴵㭩㬩筡㵩⨶〰⵴┵⨱㈰㭢㴨匨ⴭ椭縨琯㔩⤫ㄩ⨳㘷㭸⹦楬汒散琨愬〬栬戩㭸⹦楬汒散琨愬戫㌵〬栬ㅥ㌩絸⹦楬汓瑹汥㴧⍥㡣〳㌧㭸⹦楬汒散琨㈵〬⡓⠮㈪琫⸵⤫ㄮ㌵⤪㌶㜬栬栩`).replace(/u(..)/g,"$1%")))

Sep 18 2018 5:24 PM UTC

}// 140/140

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180 chars uncompressed ---> c.width=1920;h=100;for(i=5;i;){a=i*600-t%5*120;b=(S(--i-~(t/5))+1)*367;x.fillRect(a,0,h,b);x.fillRect(a,b+350,h,1e3)}x.fillStyle='#e8c033';x.fillRect(250,(S(.2*t+.5)+1.35)*367,h,h)

u/katkip

Flappy Bird
u/andreymarko

gay
u/joeytwiddle

Hey I'm doing really well at thi... oh

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cantelope

remix of d/9906 by u/anotherkitten

function u(t) {

with(x)fillStyle=`hsl(${t*=350},90%,${t%99}%`,beginPath(fill()),arc(960,540,5,0,7),X=S(t*=6)*5,Y=C(t)*5,drawImage(c,X-80,Y-45,2080+X,1170+Y)

Sep 18 2018 5:15 PM UTC

}// 140/140

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u/katkip

this is really crazy skill
u/yonatan

I'm not sure why this looks as good as it does.
u/cantelope

my fiance says this looks like "mind control"
u/Noah

That's so raven
u/anotherkitten

man you made this much more cool
u/aemkei

Wow! And I love to play with the number. eg t*=t*3 or t*=97 gives some nice effects.

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THORinHOOD

function u(t) {

w=c.width=1920
n="Hi, Dwitter!"
x.font="200px Time"
x.fillText(n.substring(0,(t*10)%(n.length+10)),w/4,w/3)

Sep 18 2018 4:10 PM UTC

}// 107/140

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u/joeytwiddle

Full marks for presentation

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sChiab8

function u(t) {

w=c.width=1920 
for(i=0;i<(t*20%400);i++){
x.fillRect(w/2+C(i+t)*i,c.height/2+C(i)*i,10,10);}

Sep 18 2018 3:19 PM UTC

}// 94/140

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galaxy o coso

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THORinHOOD

function u(t) {

q=1920;d=10;c.width=q;for(i=0;i<q;i+=20){n=(S(t)*255);k=Math.abs(S(t)*q);x.fillStyle=R(n,n,d);x.fillRect(0,i,k,d);x.fillRect(q-k,i+d,q,d)}

Sep 18 2018 3:18 PM UTC

}// 138/140

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