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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Axioplase

remix of d/33991 by u/Axioplase

function u(t) {

c.width=a=999,x.globalAlpha=.01
for(k=a;k-=9;)for(j=a;j--;)x.beginPath(),x.arc(9*k+20*S(j+t),(k/4+t-k/j)*99%650+20*C(j+k),9,0,7),x.fill()

Jun 13 2025 7:33 PM UTC

}// 137/140

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Donuts falling

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rodrigo.siqueira

function u(t) {

c.style.filter=`invert(1)`
for(i=2e4;i--;x.fillRect(r*99+960-S(k)/Z,S(r/2)*90+540+C(k)/Z,.1,t<2))
r=T(i),Z=C(S(k=i*i))*r/99-S(i/t)/r**4/99

Jun 13 2025 12:59 PM UTC

}// 138/140

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Synaptic connection #neural

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Axioplase

function u(t) {

c.width=1e3,x.globalAlpha=.01
for(k=70;k-=10;)for(j=900;j--;)x.beginPath(),x.arc(27*k+140*S(j+t),20*k+99*C(j+k),50,0,7),x.fill()

Jun 13 2025 6:05 PM UTC

}// 128/140

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joeytwiddle

remix of d/33381 by u/UEZ

function u(t) {

for(W=c.width=500,x.globalAlpha=.01,i=3e3;i--;x.fill())x.beginPath(),x.arc((i*i%W)+i/99*S(i*7+t),W-2*((i*i*C(i)+t*20)%W),i/23,0,7)

Jun 12 2025 11:36 AM UTC

}// 130/140

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#smoke redux

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rodrigo.siqueira

remix of d/33981 by u/rodrigo.siqueira

function u(t) {

for(i=4e4;i--;)r=S(n=i*i/t)*S(n)**-1.3,
X=C(k=i/4),Y=S(k),Z=r*r*S(C(i+r*9+5))/900,
x.fillRect(950+X/Z+r*r*7,650-Y/Z/1.4-r**T(i*2),.3,t<4)

Jun 12 2025 8:09 PM UTC

}// 137/140

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Tunnel structure #spiral

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skeletonNatte

remix of d/33845 by u/Axioplase

function u(t) {

c.width|=0
p=t>9?S(t-9)*300:0
for(i=9;i--;)x.fillRect(500+i*100+p,400,50,(t-i<1?Math.max(0,t-i):1)*200)

Jun 14 2025 3:06 PM UTC

}// 103/140

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#default

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BriSeven

remix of d/33983 by u/BriSeven

function u(t) {

T=t*60;for(i=0;i<120;i++){X=i/120;Y=T/68;H=Math.sin(1e3*X+1e4*Y)*43758.5453;D=1-Y+(H-Math.floor(H))*.5-.25;x.fillRect(i*16,T*16,D*16,D*16)}

Jun 12 2025 4:11 AM UTC

}// 139/140

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cubonoise

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Axioplase

remix of d/33980 by u/Axioplase

function u(t) {

c.width=g=2e3
for(i=0;i<g;)X=0|i/9,Y=i++%9,x.arc(X*99,Y*150,50,0,5+5*C(99*(1+C((t/99+X)))+5+5*S(t/10+Y)))
x.lineWidth=5,x.stroke()

Jun 12 2025 2:44 AM UTC

}// 130/140

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u/tomxor

Imagine the army of homunculi hidden under the bottom of the screen, keeping it all going with their long sticks.

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rodrigo.siqueira

remix of d/33990 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert(`
for(i=2e4;i--;x.fillRect(r*99+960-S(k)/Z,S(r/2)*99+540+C(k)/Z,.1,t<2))r=T(i),Z=C(1/r+S(k=i*i))*r*r/170-T(i/t)/i/r/r

Jun 14 2025 2:43 PM UTC

}// 140/140

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Synaptic disruption #neural

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dee-gomma

function u(t) {

for(c.width|=q=.5,x.scale(100,100),i=18;i--;x.fillRect(4+a+3*S(t),5-y-b,b?q:8-i,2*b+2*y))a=i>>1,b=i&1,y=(S(a*.39)+.3)*S(5*t)**2*(t>3.2)*2.5

Jun 9 2025 11:58 PM UTC

}// 139/140

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#default jaws

u/aleamb

amazing! lol
u/cantelope

haha