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/33899 by u/rodrigo.siqueira

function u(t) {

for(i=3e4;i--;){
r=S(n=i*i/t)*S(n)**-1.3
X=C(k=i/5)
Y=S(k)
Z=r*r*S(C(S(i+r*8))*2.4)/340
x.fillRect(960+X/Z,540-Y/Z,.1,t<3)}

Jun 3 2025 2:54 PM UTC

}// 123/140

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10-spiral star #spiral

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alien

function u(t) {

W=c.width=128;r=0.6180;X=u=v=0;for(i=0;i<32;i++)for(j=0;j<32;j++){u=S(i+v)+S(r*i+X);v=C(i+v)+C(r*i+X);X=u+t;x.fillRect(W/2+u*9,W/4+v*9,1,1)}

Jun 3 2025 7:24 AM UTC

}// 140/140

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A port of schraf Bubble Universe.

u/cantelope

this is amazing 👍

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KilledByAPixel

function u(t) {

for(c.width|=i=9;i--;)
x.rect(400+i*50+S(t)*300,400+S(i/2+t*9)*99*S(t)**9,450,200)
x.fill`evenodd`

Jun 2 2025 7:05 PM UTC

}// 98/140

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Even Odd ꔖ #default

u/Axioplase

This caught me by surprise. Fun one!

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neimad

remix of d/33878 by u/rodrigo.siqueira

function u(t) {

eval(unescape(escape`䘽⡮ⱡⱢ⤽㸡渿愺䘨ⴭ測戯⠲〰⤫椬愫戩ഊ景爨椽〻椼㌶〻⥲㵆⡩ⰱⰱ⤬砮晩汬却祬攽恨獬⠤筩紬㤹┬⑻⡩⼳㘰⤪㘰紥怬ഊ砮晩汬剥捴⡲⩃⡩⬨眽椯㈳⭴⤩⬹㘰Ⱳ⩓⡩⬫⭷⭓⡩⭴⨷⤯㔩⬵㐰ⱩⱩ⤠`.replace(/u([^D].)/g,'$1%')))

Jun 3 2025 4:23 PM UTC

}// 137/140

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rodrigo.siqueira

remix of d/33891 by u/rodrigo.siqueira

function u(t) {

for(i=2e4;i--;){
r=S(n=i*i/t)*S(n)**-1.3
X=C(k=i/4)
Y=S(k)
Z=r*r*S(T(i+r*8))/260
x.fillRect(960+X/Z,540-Y/Z,.2,t<2)}

Jun 2 2025 5:32 PM UTC

}// 116/140

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Spiraloid #spiral

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rodrigo.siqueira

remix of d/33889 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert()`
for(i=52e3;i--;x.fillRect(960+C(k=i*25)*900/Z,540-S(k)*900/Z,.1,t<3))
r=S(i*i/t)**-t-1,Z=C(S(i*90)+r/4)*3.8-S(r)*6

Jun 1 2025 8:24 PM UTC

}// 140/140

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14-fragmented flower

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Xen

function u(t) {

for(z=i=frame;z%--i;);i-1||c.before(-z)

Jun 3 2025 3:40 PM UTC

}// 39/140

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Prime Printer 39bytes

u/Xen

#prime #primes #math

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rodrigo.siqueira

remix of d/33895 by u/rodrigo.siqueira

function u(t) {

for(i=3e4;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*8)*2)/400
x.fillRect(960+X/Z,540-Y/Z,.1,t<3)}

Jun 3 2025 2:17 PM UTC

}// 118/140

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Intertwined 8/16-spiral #spiral

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rodrigo.siqueira

remix of d/33885 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert(1)`
for(i=4e4;i--;x.fillRect(960+C(k=i+r*r)*800/Z,520-S(k)*800/Z,.1,t<2))
r=S(w=i*i/t)-t,Z=C(1/S(i*13))*9-7/r*S(r/5)

Jun 1 2025 5:09 PM UTC

}// 139/140

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Main eye

u/cantelope

lol

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Xen

remix of d/33902 by u/neimad

function u(t) {

for(i=666;i--;x.fillRect(X=i*C(i+(w=i/19+t))+666,Y=i*S(i+w+S(i+t*7)/5)+440,i,i),x.strokeRect(X,Y,i,i))x.fillStyle=`hsl(${i},99%,69%,.04`

Jun 3 2025 5:35 PM UTC

}// 136/140

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quick golf and play