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.

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Current theme challenge: #Food

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gunno

function u(t) {

c.width|=0;
for(i=2e4;i--;)x.fillRect(S(t+i)*(200*S(i**3)+(S(i**3+(C(i)*0.4))**2e3)*500)+960,540+C(i**3)*200,3,3)

Aug 22 2025 12:44 PM UTC

}// 113/140

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u/joeytwiddle

If you want a black background, add c.style.filter='invert(1)'

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cantelope

function u(t) {

eval(unescape(escape`𩡯𬠨𮀮𩱬𫱢𨑬𠑬𬁨𨐽𛠱𛁸𛡦𪑬𫁒𩑣𭀨𜀬𜀬𪐽𜑥𝀬𪐩𞱩𛐭𞱸𛡣𫁥𨑲𤡥𨱴𚀹𝠰𚱓𚁬𚰽𭀯𞀩𚡓𚁱👩𙐲🀮𝐿𫠺𜰮𜠭𫠩𚠨𫐽𜐫𤰨𬐪𞀫𭀫𫀪𜰩𛰸𚐯𚁚👃𚁬𚐪𤰨𬐩𚰱𚐪𚁨🐵𝀰𚐬𪀫𠰨𬐩𚡭𛱚𚡨𛁳🐵𛰨𛠱𚱚𚐬𬰩𚑮🐨𚁬👩𚠪𛠹𚐥𜐩𚠪𛠵𚠱𛠶`.replace(/u../g,'')))

Aug 23 2025 12:43 AM UTC

}// 138/140

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cantelope

function u(t) {

for(x.fillRect(0,0,i=2e4,i);i--;x.clearRect(960+S(l+=t)*S(q=i%2<.5?n:3.2-n)/(Z=C(l)*S(q)+1)*(h=540),h+C(q)/Z*h,4,4))n=((l=i**.9)%1)**.5*1.6

Aug 22 2025 6:00 PM UTC

}// 139/140

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no Math.random

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KilledByAPixel

remix of d/34228 by u/KilledByAPixel

function u(t) {

with(x)for(j=w=1600;j--;fillRect(w*S(a=a/w+i),w*S(a*i/29),i,i))i=j>>4,fillStyle=`hsl(${a=i*t+i} 99%${i}%`,t?rotate(.3927):translate(.6,.34)

Aug 22 2025 2:26 PM UTC

}// 139/140

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Psychedelic 🍭

u/joeytwiddle

and fruity!

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KilledByAPixel

remix of d/34226 by u/KilledByAPixel

function u(t) {

with(x)for(i=99;--i;fillStyle=`hsl(${-i*t} 99%${i}%`)for(j=16;j--;fillRect(-T/2,T*S(i+i*t/T),T=4e3,5))t?rotate(Math.PI/8):translate(.62,.35)

Aug 22 2025 1:59 AM UTC

}// 140/140

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Kaleidoscopic 🌈

u/joeytwiddle

#kaleidoscope

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cantelope

remix of d/34233 by u/cantelope

function u(t) {

for(x.fillRect(0,0,i=2e4,i);i--;x.clearRect(960+S(l+=t)*S(q=i%2<.5?n:3.2-n)/(Z=C(l)*S(q)+2)*(h=540),h+C(q)/Z*h,2,2))n=((l=i**.9)%1)**.5*1.6

Aug 22 2025 6:00 PM UTC

}// 139/140

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no Math.random

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KilledByAPixel

remix of d/34225 by u/KilledByAPixel

function u(t) {

with(x)for(t||translate(960,540),j=6;j--;)for(i=95;i--;fillRect(-T/2,T*S(i+i*t/T),T=4e3,5))fillStyle=`hsl(${i*t} 99%${i}%`,rotate(Math.PI/3)

Aug 21 2025 8:52 PM UTC

}// 140/140

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Hypnotic Symmetry 👁️

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cantelope

function u(t) {

eval(unescape(escape`𩡯𬠨𮀮𩱬𫱢𨑬𠑬𬁨𨐽𛠲𛁸𛡦𪑬𫁒𩑣𭀨𜀬𜀬𪐽𜑥𝀬𪐩𞱩𛐭𞱸𛡣𫁥𨑲𤡥𨱴𚀹𝠰𚱓𚁬𚰽𭀯𝀩𚡓𚁱👩𙐲🀮𝐿𫠺𜰮𜠭𫠩𚠨𫐽𜐫𤰨𬐪𞀫𭀪𝀫𫀪𜰩𛰸𚐯𚁚👃𚁬𚐪𤰨𬐩𚰱𛠶𚐪𚁨🐵𝀰𚐬𪀫𠰨𬐩𚡭𛱚𚡨𛁳🐮𝐫𜠯𦠬𬰩𚑮🐨𚁬👩𚠪𛠹𚐥𜐩𚠪𛠵𚠱𛠶`.replace(/u../g,'')))

Aug 23 2025 12:45 AM UTC

}// 139/140

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u/magna

Sexy!

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KilledByAPixel

remix of d/34219 by u/KilledByAPixel

function u(t) {

with(x)for(i=99;--i;fillRect(T*S(i+i*t/T),-1e3,9,T=2e3))fillStyle=`hsl(${i*t/3} 99%${i}%`,t?rotate(Math.PI/2):translate(9.8,5.5)

Aug 21 2025 4:55 PM UTC

}// 128/140

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Symmetric Patterns ☕

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mxfh

remix of d/1137 by u/mxfh

function u(t) {

r=480,m=Math,l=m.PI/2;c.width=4*r;for(φ=a=l;φ>-a;φ-=a/r)s=S(φ),p=C(φ),x.fillRect(p*S(λ=T(l+C(t/2))*m.atanh(s))*r+2*r,s*r+r,z=9*C(λ/2)*2,z*p)

Aug 21 2025 12:14 AM UTC

}// 140/140

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#sphere #loxodrome #rhumbline