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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mxfh

remix of d/2442 by u/mxfh

function u(t) {

c.width|=b=50
h=S(t)
for(e=6.283;e>0;x.lineTo(d*C(e-=.01)+h*(C(e)+T(e/3+t/T(e)))+960,d*S(e+S(t)/9)-h+540))d=420
x.fill("evenodd")

Jan 22 2019 11:44 PM UTC

}// 129/140

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u/Xen

NICE! :-)
u/katkip

Haha
u/magna

#glitch
u/mxfh

this one doesn’t even need the fillrule. Was just looking into other cycloids and Lissajous figures, only to end up with a circle.

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rodrigo.siqueira

remix of d/34540 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert()sepia(.7)`
for(𝕏=X=Y=i=9e4;i--;𝕏=X,x.fillRect(Y*4e3+820,2650-X*4e3,t<.5,.1))
X=T(X*X-Y*Y*.3)%(9/t)+.3,Y=C(2*𝕏*Y+1.5)

Nov 20 2025 2:23 PM UTC

}// 140/140

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Sequential dots of light

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rodrigo.siqueira

remix of d/33527 by u/rodrigo.siqueira

function u(t) {

x.fillStyle=R()
for(x.fillRect(0,0,k=2e3,k);j=--k>>4;x.fillRect(960+S(k|j)*k/2,j+T(k+t/9)*k,z=C(j+t)*25,z))x.fillStyle=R(k/6,0,180,S(j+t))

Mar 31 2025 12:00 AM UTC

}// 138/140

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Sparkling lights

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yonatan

function u(t) {

onmousedown=_=>d++
X+=S(m=d*Math.PI/2)
Y+=C(m)
x.fillRect(X*9&2047,Y*9&1023,9,9)
};{X=Y=d=0

Mar 29 2018 8:49 PM UTC

}// 91/140

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click to turn

u/fujimotos

Changing the callback to "x.fillStyle=hsl(${d++*25},50%,50%)" turns it into an abstract art generator :)
u/yonatan

swapping PI/2 for PI/5*6 gets you pentagrams :)

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pavel

remix of d/10354 by u/pavel

function u(t) {

for(x.fillRect(0,0,i=W=c.width=600,W);i;i-=5)for(j=0,a=((W*i^1e7)+t*W)%W;j<a;x.fillText(i%j&1,i,j+=9))x.fillStyle=R(b=(a-j<9)<<8,300+j-a,b)

Oct 13 2018 4:01 AM UTC

}// 139/140

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Matrix Rain v2

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384.cz

function u(t) {

document.write`<iframe src=#></iframe>`

Mar 15 2024 7:05 PM UTC

}// 39/140

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H4X0R

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danny@hille.dk

function u(t) {

for(c.width|=i=114;i--;)for(j=66;j--;x.fillRect(i*18-P/2,j*18-P/2,P,P))P=S(((j-i)&(j+i))+t)*9+9

Apr 12 2023 7:58 PM UTC

}// 95/140

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u/tomxor

Weird... I like it :)
u/joeytwiddle

#sierpinski in the machine
u/acets1337

Galaga :D

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KilledByAPixel

remix of d/34411 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`󨼮󬽴󮝬󩜮󩭩󫍴󩝲󟜧󪝮󭭥󬭴󚌧󒭡󟝴󙜲󒭦󫽲󚍩󟜲󩜳󞽩󛜭󞽸󛭦󪝬󫍒󩝣󭌨󜬶󜌫󨬪󝌶󜌫󬬪󦌬󝌶󜌫󤼨󨬪󨬩󚬲󝌹󚽲󚭙󛍷󟝡󟌱󛬹󝼿󛬵󞭱󛍷󚜩󬜽󪜥󝬬󨬽󭌾󟬱󛍚󟝩󚬪󚌮󞜫󨬩󙜱󛍗󟜱󛝚󛍘󟝱󟽗󚭓󚍩󚜺󤼨󪜯󜭥󜼩󛍙󟝱󟽗󚭃󚍩󚜺󪜯󜼰󜌬󬬽󨜪󞌹󚽓󚍢󚜪󝜹󚽩󙜹`.replace(/u../g,'')))

Apr 21 2026 2:34 PM UTC

}// 140/140

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Blowballs 🌼

u/UEZ

#dandelions

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coderkid

remix of d/5186 by u/coderkid

function u(t) {

if(t%2<1){c.width|=0;x.font="14em 💩";for(s=9;s--;)for(a=8;a--;)x.fillText(['◐','◑','◒','◓'][(Math.floor(Math.random()*4))],s*213,a*216-9);}

Jan 7 2018 6:47 PM UTC

}// 139/140

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u/iverjo

#dots

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5Mixer

function u(t) {

y=(h=999)/2;i=w=c.width=h*2;
while(i--){x.fillStyle=R(i/7,(w-i)/7,i)
o=(h-i)%y
l=C(o*4)*(o%(w/(S(t)*9)))
x.fillRect(i,y+S(i/w*9+t)*99,1,l)}

Feb 24 2017 10:28 AM UTC

}// 140/140

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Some interesting tricks - I use a backwards while loop, not sure if this is shorter. To go from screen width to 256 for colours, I divide by 7. Alot of variable reuse. First one, enjoy heh :)