Random dweets | Dwitter

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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rodrigo.siqueira

remix of d/31964 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`sepia(.6)invert(`
t?x.drawImage(c,~x.fillText(this,~x.scale(s=1-C(1/++t**9)/26,s),0),~x.rotate(1)):x.translate(980,540)

Jun 10 2024 9:36 PM UTC

}// 135/140

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6 spirals made of [object Window] (if you look closely) #spiral

u/cantelope

haha
u/aleamb

lol! amazing

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rodrigo.siqueira

remix of d/28843 by u/alien

function u(t) {

for(c.width=j=-85;j<85;j++)for(i=-150;i<151;x.fillStyle=R(6*s/q,s/5,q))q=(i++*i+j*j)**(.7+t/1500)/14,s=370*C(q*q),x.fillRect(i+148,j+85,1,1)

Nov 11 2023 3:16 PM UTC

}// 140/140

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HAL's eye

u/cantelope

similar d/21033

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rodrigo.siqueira

remix of d/34575 by u/rodrigo.siqueira

function u(t) {

t?c.style.filter=`invert()sepia(`:𝕏=X=Y=0
for(i=3e4;i--;𝕏=X,x.fillRect(X*3800-980,Y*3e3-90,t<2,.1))
X=(X*X-Y*Y*.3)%9+.27,
Y=C(2*𝕏*Y%1+1.15)

Dec 3 2025 11:21 AM UTC

}// 139/140

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Vortex ring

u/rodrigo.siqueira

Two spirals can be seen (in fullscreen mode)
u/ximavus

yeah I can see them at the top and bottom

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Xen

remix of d/13938 by u/WasifBoomz

function u(t) {

x.fillRect((t|0)*700,!x.fillRect(!x.clearRect(1400,z=99,z,400),490,700,z),z,2e3)

May 17 2019 6:19 PM UTC

}// 80/140

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Golfed a bit

u/magna

Hi!
u/magna

#waitforit

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FireFly

function u(t) {

f = t*60|0
X =  f%120, Y = f/120|0
x.fillStyle = "]!{$${!]".charCodeAt(X%16) + 59 >> Y%12& 1? '#345' : '#DEF'
x.fillRect(X*16, Y*16, 16, 16)

Feb 27 2017 6:20 PM UTC

}// 140/140

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u/sigveseb

cool!
u/sfz

wtf is going on here?!
u/FireFly

The string embeds a tiny bitmap which is simply repeated :)
u/5Mixer

This is an awesome idea! I wonder what else you could do with using strings to encode more complex(?) data. Interesting.
u/PiggyClone205

When I read complex, I immediately thought of maybe importing other javascript and cheating a bit.
u/katkip

#invaders

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23_Skidoo

function u(t) {

l=255;x.rotate(.008);x.translate(5,5)
for(i=0;i<l;i++){x.fillStyle=R(l*C(t/4),l*S(i/l+t),l*S(t),0.05)
x.fillRect(-l+i*30,-l,2,2E4)}

Jan 31 2019 8:17 AM UTC

}// 131/140

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FireFly

function u(t) {

if(t%12<.01)c.width|=0;x.beginPath();for(i=12;i;x.moveTo(960+40*i*C(T),540+40*(i-1)*S(T)),x.arc(940,540,40*i,T,T=t/8%1*--i*6.28));x.stroke()

Feb 28 2017 12:21 PM UTC

}// 140/140

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u/SpecialAgent

Impressive! Reminds me of a clockwork orange.

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rodrigo.siqueira

remix of d/34548 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert()sepia()`
for(𝕏=X=Y=t,i=3e4;i--;𝕏=X,x.fillRect(Y*2e3+410,X*1600-310,t<2,.1))
X=(X*X-Y*Y*.4)%5+.326,Y=C(2*𝕏*Y+1)-.15

Nov 22 2025 5:39 PM UTC

}// 138/140

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Microscopic bugs

u/joeytwiddle

#organic

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xyper

function u(t) {

c.width=1920;for(i=0;i<9;i++){x.lineWidth=10;x.moveTo(960,0);x.lineTo(S(t+i*1.4)*500+960,1080)}x.stroke()

May 14 2023 2:32 PM UTC

}// 105/140

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the mountain spins both ways

u/Smorg

hmmmm
u/donbright

nice illusion

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taupelink

remix of d/25776 by u/taupelink

function u(t) {

eval(unescape(escape`稽⸶ㄫ䵡瑨⹲慮摯洨⤯ㅥ㌻景爨洽琿〺㉥㐻洭ⴾㅥ㐻砮晩汬⠩⥸⹢敧楮偡瑨⡸⹦楬汓瑹汥㵒⡪㵭⨪⡧㵭╺⤬横⸸ⱪ⨮㜵ⱱ㵓⡭⤪⨴⤩ⱸ孱㸮㔿❡牣✺❲散琧崨⡭┱㌭⸵⤪ㄶ〬⡪簰⤥㤪ㄳ㔬㐰⽱ⱪⱪ⵺⽧⤠`.replace(/u([^D].)/g,'$1%')))

Jul 6 2022 2:04 AM UTC

}// 140/140

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d/25779 randomized arrangement in taupe

Show more comments…
u/tomxor

Oooh nice! Feels so tangable yet i don't know what it is O_o something of wood?
u/taupelink

thank you! it reminded me tangentially of a wine rack.
u/eyaler

i love it, but noob question - the decoded string is the same length. so why encode?
u/eyaler

z=.61+Math.random()/1e3;for(m=t?0:2e4;m-->1e4;x.fill())x.beginPath(x.fillStyle=R(j=m**(g=m%z),j*.8,j*.75,q=S(m)**4)),x[q>.5?'arc':'rect']((m%13-.5)*160,(j|0)%9*135,40/q,j,j-z/g)
u/taupelink

thank you! i think it's 177 chars when uncompressed
u/tomxor

The funny thing is that it's actually much much longer when you count in bytes. The uncompressed is 178 bytes because it's pure ASCII and the compressed is 319 bytes due to all the multi-byte unicode. (you can get the UTF8 encoded byte length using new TextEncoder().encode('code').length