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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magna

function u(t) {

if(!t)for(i=9;i--;)x.fillRect(400+i*100,400,50,200)
c.style.marginLeft=`${S(t)*300*c.offsetWidth/1920}px`

Apr 15 2021 11:46 PM UTC

}// 105/140

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#default but the canvas is moving

u/taupelink

nice
u/Xen

love it!

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384.cz

function u(t) {

l=1e3
for(i=9;i--;)x.fillRect(60*i+l*S(t),80,30,150),x.drawImage(c,T,T,T,T)
T.valueOf=_=>Math.random()*l
x.fillStyle=R(f=(t*l)%l,f,f+f)

Jan 1 2025 6:21 PM UTC

}// 135/140

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#default

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penguin

function u(t) {

c.width=2e3;z=1e3;b=x.lineTo.bind(x);for(i=0;i<z;i+=z/t)b(0,i),b(z-i,0),b(z,z-i),b(i,z),x.strokeStyle='hsl('+90*t+',75%,50%)',x.stroke();

Dec 27 2017 9:00 PM UTC

}// 137/140

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taupelink

remix of d/23714 by u/taupelink

function u(t) {

for(i=k=640;--i;x.fillRect(k+k*X,k-i*Y,Y*i*v,6*q*X*v))f=i*t,X=f*f%3-1,Y=X*f%4-2,x.fillStyle=R(q=i*Y*C(X*Y),q*=-S(q/X)/Y,i/2,k/q/q),v=.8**t/t

Sep 4 2021 1:50 AM UTC

}// 140/140

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d/23737

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taupelink

remix of d/21309 by u/taupelink

function u(t) {

for(i=k=60;i--;x.fillRect(k*X,k*Y,i/t,i/t))f=i*t,X=f*f%32,Y=X*f%18,h=i*S(m=C(q=Y%C(X/2)*9+4)%C(p=Y%C(Y/2)*X%3)*7),x.fillStyle=R(h*m,h*p,h*q)

Jan 23 2021 9:45 PM UTC

}// 140/140

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d/21416

u/Xen

very arty
u/danny@hille.dk

pollockesk

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nabbydude

remix of d/8813 by u/nabbydude

function u(t) {

for(i=9;i--;P[j]%=1920-j*840)d+=(a=x.getImageData(...P).data[3])|!x[a?"clearRect":"fillRect"](...P),P[j=d&1]+=d&2?5:17275}{P=[d=960,540,5,5]

Jul 13 2018 8:59 PM UTC

}// 140/140

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Fixed the colors and just barely managed to squeeze in a loop to speed it up

u/lionleaf

Ooops, looks like the }{ trick broke. Sorry :|
u/nabbydude

haha, just another challenge to overcome ;)

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codezmr

function u(t) {

for(i=4e3;i--;x.fillRect(960+Math.sin(a)*d,540+Math.cos(a)*d,2,2))a=i+t,d=Math.tan((i^t*9)/9)*200

Jan 16 2026 1:35 PM UTC

}// 97/140

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KilledByAPixel

remix of d/33910 by u/rodrigo.siqueira

function u(t) {

for(X=Y=i=1e4;i--;x.fillRect(i,~x.clearRect(960+X*250,540+Y*250,3,3),!t||.1,2e3))j=i>>8,X=C(a=Y+j)+C(b=X+j*(t/99+9)),Y=S(a)+S(b)

Jun 4 2025 7:33 PM UTC

}// 128/140

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Crystal Ball 🔮

u/KilledByAPixel

https://x.com/yuruyurau/status/1226846058728…
u/magna

WOW
u/cantelope

#unbelievable
u/joeytwiddle

123 chars if you are happy to do black-on-white

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rodrigo.siqueira

remix of d/23536 by u/mxfh

function u(t) {

r=106;c.width|=w=300;for(λ=φ=a=w/r;λ+=a,φ>-a*12;φ-=.1)x.arc(C(φ)*S(d=λ-t)*r+960,(S(φ+a/4)*C(d))*r+530*(1+1/t),φ*φ,0,7)
x.fill("evenodd")

Aug 11 2021 2:07 PM UTC

}// 136/140

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Spinning Vortex #vortex

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sanco

function u(t) {

for(i=99;i-=3;)for(z=99;z-=3;x.fillRect(i*20+S(i+t)*20,z*20+C(i*z+t)*20,t*5,t*5),x.fillStyle=R(i*+S(t)*2,i+S(t)*2,i+C(t)*3,100));

Mar 2 2022 3:15 PM UTC

}// 130/140

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Patterns