Dweets awesomed by u/Tekmap

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) {

for(c.width|=i=8;i--;x.beginPath())x.rect(400+i*100+S(t)*300,400,50,200),x.arc(425+i*100+S(t)*240,500+C(t+i*3)*100,35,0,7),x.fill("evenodd")

Apr 17 2019 12:46 PM UTC

}// 140/140

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#default with small inverters floating

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KilledByAPixel

function u(t) {

for(x.fillRect(0,0,i=F=2e3,F);i--;)x.clearRect((S(i)*1e9-t*i/9)%F,i*9%F,j=i%7,j)

Apr 17 2019 5:42 AM UTC

}// 80/140

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2D #Starfield golfed down to 80 bytes!

u/KilledByAPixel

Reposted to fix issue where it would slow down over time. (It still does but it takes MUCH longer.)

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rodrigo.siqueira

remix of d/13206 by u/pavel

function u(t) {

for(i=c.width|=h=1.6+(t<<1);Y=i--%3-1||S(i);x.fillRect(960+S(a+t)*800/r/z,540+Y*800/z,s=18/z,s))a=i%3?i:i*h,r=T(a%h+h/3),z=3+S(t)+C(a+t)/r

Apr 16 2019 2:27 PM UTC

}// 138/140

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Spin particles #d3

u/f8f82804

#perspective

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vinca

function u(t) {

for(c.width|=i=0;81-i;)x.globalAlpha=.9,x.fillStyle=R(99*S(t+i)+99,99*S(t+i/9)+99,i),x.fillRect(210*(i/9|0),i++%9*120+9*S(t+i/3),220,130)

Apr 11 2019 8:54 AM UTC

}// 137/140

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Jezza

remix of d/13106 by u/Jezza

function u(t) {

x.globalAlpha=0.1;x.fillRect(0,0,2e3,2e3);for(i=314;a=.02*i,i--;)x.clearRect(1e3+(500+9*T(.01*i*(S(t/20)*20)))*S(a),530+500*C(a),99,2)

Apr 9 2019 10:58 PM UTC

}// 134/140

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C -> S

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pavel

function u(t) {

for(c.width|=k=0;k<50*t;x.ellipse(960,540-750*(i%2-.5)*y,r=400*(1-y*y)**.5,r/3,0,a=(2*i+k++%2-t)%16*.393,a))i=k/98|0,y=k%98/49-1
x.stroke()

Apr 9 2019 12:06 AM UTC

}// 139/140

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Single stroke beach ball sketch

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vinca

function u(t) {

for(c.width|=a=.02,x[r='fillRect'](0,0,2e3,2e3),i=360;i--;)x.fillStyle='#C97',x[r](1e3+(500+9*T(.01*i*(t%20)))*C(a*i),530+500*S(a*i),99,2)

Apr 8 2019 1:24 PM UTC

}// 138/140

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vinca

function u(t) {

for(t||0(X=Y=.1,b=.86,r=280),i=1e3;i--;)x.fillStyle=R(9),x.fillRect((i%9?1e3:0)+r*X,r*Y+99,1,1),V=(1+1.02*b)*X-b*X*Y,W=(1-b)*Y+b*X*X,X=V,Y=W

Apr 7 2019 8:43 AM UTC

}// 140/140

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u/katkip

This is beautiful

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username

function u(t) {

eval(unescape(escape`睩瑨⡸⥻晩汬却祬攽❂畲汹坯潤✬晩汬剥捴⠰ⰰⰱ㤲〬㄰㠰⤬堽䌨琯㈩⨶⬱㘬夽匨琯㈮ㄩ⨶⬹Ⱨ汯扡汁汰桡㴮〱㭦潲⡩㴹㤻椭ⴻ⥚㵓⡙⤬夫㵃⡘⤬堫㵚Ᵽ汥慲剥捴⡘⨶〬太㘰ⰵⰵ⥽`.replace(/u(..)/g,"$1%")))

Mar 30 2019 9:10 PM UTC

}// 127/140

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persistence

u/username

d/12755

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rnbw

function u(t) {

for(c.width^=i=0;i++<39;x.fill()){x.fillStyle=`hsl(${Math.random()*60},99%,40%,8%)`;x.arc(C(t/4-(i&t*5))*460+960,S(i&t*4)*460+540,0,0,0)}

Mar 29 2019 2:23 PM UTC

}// 137/140

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chthonic 🔥

u/katkip

#glitch
u/DataMeta

I like the choice of coloration
u/DataMeta

Luckily this SCP seems contained

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