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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HardlyProductive

function u(t) {

for(p=q=i=2e3;i--;)r=Math.random(),s=r<.9?1:-1,b=r<.8,X=b?.9*p-q/22:-s*q/4,q=b?p/22+.9*q+4:s*p/4+.5,p=X,x.fillRect(960+p*25,980-q*25,1,1)

May 15 2026 7:31 AM UTC

}// 137/140

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Barnsley fern

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taupelink

remix of d/35363 by u/taupelink

function u(t) {

for(i=z=2e3;i--;x.fillRect(i,180*t,2*z,z*=2-C(i/(360+2*z))))x.fillStyle=`hsl(${225-(z&=14)**2},45%,${35+5*(z+=3*C(z+=t)+C(z+i**.5))}%,.5)`

May 14 2026 11:03 PM UTC

}// 138/140

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d/35371 Bit Of Turbulence

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rodrigo.siqueira

remix of d/35351 by u/rodrigo.siqueira

function u(t) {

for(i=99;i--;f(i,t,900))f=(X,Y,n)=>n--&&(f(1.2+.8*(X*C(Z=1/C(X*X+Y*Y)-6)-Y*S(Z)),X*S(Z)+Y*C(Z),n),x.fillRect(X*500+360,Y*400+550,t<3,.2))

May 15 2026 2:17 PM UTC

}// 137/140

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Marbled paper effect

u/cantelope

don't get me started about marbled paper! half the stores i go to have it on every isle. I can't throw a rock without hitting some marbled paper. my house is stacked with ream after ream of it. towers of marbled paper from floor to ceiling. My clothes, bedding, wallpaper... you guessed it. all marbled paper. great dweet by the way.

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taupelink

remix of d/35362 by u/taupelink

function u(t) {

for(i=z=2e3;i--;x.fillRect(i,170*t,(z&=3)+6,9))x.fillStyle=`hsl(${[195,60,30,150][z]},${45-4*(z+=5*S(z-t)*S(z-i/200))}%,${60+35*S(z)}%,.2)`

May 14 2026 2:15 AM UTC

}// 139/140

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d/35369

u/KilledByAPixel

nice, good colors
u/cantelope

great colors!

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taupelink

remix of d/35304 by u/taupelink

function u(t) {

with(x)for(m=1e3;m--;fill(arc(m%11*192+r*C(i=m*1.5708),(m>>4)%7*192+r*S(i),r*w,i+5,i+t)))beginPath(fillStyle=R(r=m**(1-t/12),r,r,w=t*.4**t))

May 14 2026 4:07 AM UTC

}// 140/140

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d/35370

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taupelink

remix of d/35363 by u/taupelink

function u(t) {

for(i=z=2e3;i--;x.fillRect(i,190*t,9,z/=.7+S(i/31-z)/3))x.fillStyle=`hsl(${[225,195,30,53][z&=3]},60%,${70+5*(z+=5*S(z+=5*t)*S(i/38))}%,.5)`

May 12 2026 11:42 PM UTC

}// 140/140

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d/35364

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mark1626

remix of d/35366 by u/mark1626

function u(t) {

for(i=k=256;--i;x.fillRect(960+k*X*C(Y),540+k*X*S(2*Y),w=i/t,w))f=i*t,X=f*f%5,Y=X*f%13,x.fillStyle=R(q=i*S(T(4*X)|T(3*Y)),T(T(X+q)),T(q/i))

May 13 2026 3:59 AM UTC

}// 139/140

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hallway

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taupelink

remix of d/35357 by u/taupelink

function u(t) {

with(x)for(m=600;m--;fill(arc(m**3%2e3,m*m%1221,m/(i*t)**t,i*=94.96,i-3-t)))beginPath(fillStyle=`hsl(${i=60+(m&13)**2},70%,50%,${t/i**.7})`)

May 13 2026 5:10 PM UTC

}// 140/140

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d/35368

u/taupelink

Created on Windows on a Chrome-based browser. Looks a little different on iOS Safari

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taupelink

remix of d/35363 by u/taupelink

function u(t) {

for(i=z=2e3;i--;x.fillRect(i,180*t,z+=4+8*S(z+=t),9))x.fillStyle=`hsl(${[0,150,195,15][z&=3]},60%,${90+t*C(z-t)*(z+=6*S(i/(z+=2)**4))}%,.2)`

May 13 2026 2:00 AM UTC

}// 140/140

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d/35365

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taupelink

remix of d/35362 by u/taupelink

function u(t) {

for(i=z=2e3;i--;x.fillRect(i,154*t,z/=.6+S(i/320+z)/6,25))x.fillStyle=`hsl(${[210,150,50,15][(z=z%3+t/2)&3]},60%,${50+9*(z+=4*C(z/2))}%,.2)`

May 11 2026 3:34 AM UTC

}// 140/140

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d/35363

u/magna

Wow