Dwitter - javascript demos in 140 characters

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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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rodrigo.siqueira

remix of d/35225 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert(`
𝕏=X=Y=t
for(i=4e4;i--;𝕏=X,x.fillRect(1e3+X*900,340-Y*700,t<3.9,.1))X=(X*X-Y*Y*.8+.02)%1,Y=C(2*𝕏*Y+2+i%2*t/(20-t*2))

Apr 30 2026 1:08 AM UTC

}// 140/140

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Heart attractor

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taupelink

remix of d/35291 by u/taupelink

function u(t) {

with(x)for(m=2e3;m--;fill(arc(m%11*190+r*C(m),(m>>2)%7*190-r*S(m),r/w,i=m*.4,i-6+t)))beginPath(w=2**t,fillStyle=R(r=m**(1-t/8),r,r,9*t/r/w))

Apr 29 2026 4:14 AM UTC

}// 140/140

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d/35293

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skeletonNatte

remix of d/11886 by u/katkip

function u(t) {

s=(~~t)/2%5
c.width*=1;for(i=43;i--;)for(j=71;j--;)
x.fillRect(j*30+S(i/s+t)*100-100,i*30+C(j/s+t)*100-100,30,30)

Apr 29 2026 8:39 PM UTC

}// 113/140

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stood up too fast

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rodrigo.siqueira

remix of d/34746 by u/rodrigo.siqueira

function u(t) {

x.reset()
for(i=651;i--;)
for(j=16;j--;x.fillRect(960+S(k=i/69.08*4/3)*r,540+C(k)*r,4,4))r=410-12*j+19*C(i/17.27-j/9)*(-2+S(t*3+S(j/2+t*5)))

Apr 28 2026 2:17 AM UTC

}// 140/140

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Animated object

u/Agmerboi

awsome
u/Agmerboi

awsome

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taupelink

remix of d/35267 by u/taupelink

function u(t) {

with(x)for(m=1e3;m--;fill(arc(m%23*90+r*C(m),(m>>6)*90-r*S(m),r/w,i=m*.4,i-6+t/5)))beginPath(w=t**(t/4),fillStyle=R(r=m**(1-t/8),r,r,t/r/w))

Apr 29 2026 2:53 AM UTC

}// 140/140

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d/35291

u/SockTaters

Blends in perfectly with the cracks in my phone screen XD

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taupelink

remix of d/35293 by u/taupelink

function u(t) {

with(x)for(m=1e3;m--&&t<3;fill(arc(m%7*384+r*C(i=m*95),(m/13|0)%5*384+r*S(i),r*w,i,i-6+t)))beginPath(fillStyle=R(r=m**(1-t/12),r,r,w=.7**t))

Apr 30 2026 2:12 AM UTC

}// 140/140

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d/35296

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HardlyProductive

function u(t) {

a=9e3;for(x.fillStyle="#0001",x.fillRect(0,0,a,a),x.fillStyle='red';a--;)x.fillRect((a%5*811+t*a/3)%a,a/5|0,5*(Math.random()*20<a%25),5)

Apr 28 2026 12:55 AM UTC

}// 136/140

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lasers

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Agmerboi

remix of d/35282 by u/HardlyProductive

function u(t) {

a=9e3;for(x.fillStyle="#0001",x.fillRect(0,0,a,a),x.fillStyle='blue';a--;)x.fillRect((a%5*811+t*a/3)%a,a/5|0,5*(Math.random()*20<a%25),5)

Apr 28 2026 1:51 PM UTC

}// 137/140

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u/cantelope

neat idea

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Agmerboi

function u(t) {

f=['🍦','🍺']
r=(a)=>Math.round(Math.random()*a);
x.font='120px Arial'
x.fillText(f[r(1)],r(1920),r(1080))

Apr 28 2026 1:55 PM UTC

}// 104/140

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dee-gomma

function u(t) {

for(f=r=a=128,c.width=448;r;x.fillRect(f+C(g=a+.78)*r,f*q+S(g)*r,!(r&((q-1.3)*S(a*2)*(200+r*C(a)+r*S(a)))),1))a=a>6.3?0*r--:a+1/r,q=C(t)/9+1

Apr 25 2026 11:14 AM UTC

}// 140/140

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#sierpinski metamorphosis - butterfly ant spider angel

u/cantelope

"'Come on home, girl' he said with a smile. 'I cast my spell of love on you, a woman from a child'" -heart, magic man
u/gennadiy

Зачем спидранить и одновременно зачитывать фристайл рэперу Oxxxymiron?
u/Agmerboi

did you hear about the serial murder who was an acrobat? the police say shes twistd