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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tzador

function u(t) {

E=0.5
X=Math.cos(t)*(2-0.5/Math.cos(t*Math.PI))
Y=Math.sin(t)*(2-0.5/Math.sin(t*Math.PI))
x.fillRect(X*500/3+1920/2, Y*500/3+1080/2,10,10)

Jun 26 2025 12:20 AM UTC

}// 139/140

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Give it some time

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rodrigo.siqueira

remix of d/34037 by u/rodrigo.siqueira

function u(t) {

for(i=2e3;i--;x.fillRect(i,t*60,1,C(z)),x.fillStyle=`hsl(${X},70%,${X/Y/9}%)`)for(z=0,j=9;--j;)z-=C(X=i/6/j)*S(Y=z-S(t+j)*2-t/9)/3+z*S(Y)

Jun 25 2025 2:17 PM UTC

}// 137/140

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colored spots

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KilledByAPixel

remix of d/34036 by u/KilledByAPixel

function u(t) {

w=c.width|=i=16
with(x)for(rotate(z=95);i--;beginPath(fill(arc(1e3+z*S(t*3),(20*i-t%20-.5)*z-w,z*2.5,0,9))))fillRect(-w,(i*2-t%2)*z-w,6e3,z)

Jun 23 2025 6:58 PM UTC

}// 140/140

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Illusion Redux 👁️

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KilledByAPixel

remix of d/34022 by u/KilledByAPixel

function u(t) {

for(i=2e3;i--;x.fillRect(i,t*60,1,z/7+.5))for(z=0,j=9;--j;z+=F(Y=t*5/j-z+j,X=i/19/j)*(1-Y%1)+Y%1*F(Y+1))F=Y=>X%1*S(X^Y)+(1-X%1)*S(X-1^Y)

Jun 22 2025 3:16 PM UTC

}// 136/140

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Mountainous ⛰️

u/Joachim

Very impressive!
u/Xen

Top shelf dweet!
u/cantelope

wow. that's neat

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hello@perk.ee

function u(t) {

x.beginPath()
x.fillStyle=`hsl(${10*t} 50%50%)`
h=n=>x.lineTo((S(n)+1)*960,(C(n)+1)*540)
x.moveTo(960,540)
h(t)
h(t+.1)
x.fill()

Jun 26 2025 10:13 PM UTC

}// 128/140

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rodrigo.siqueira

remix of d/34033 by u/KilledByAPixel

function u(t) {

for(i=2e3;i--;x.fillRect(i,t*60,1,z/10))for(z=0,j=9;--j;z+=F(Y=t/j-S(z+j)+j,X=i/20/j)+Y*F(Y)/9)F=Y=>S(X-Y)*C(X+Y)/5+S(X+Y)-S(Y)

Jun 23 2025 3:51 PM UTC

}// 127/140

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Plasma effect #plasma

u/Axioplase

Silky!
u/UEZ

Chromatic

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Axioplase

function u(t) {

c.width=1920
for(i=0;i<90;i++)
x.fillRect(i*100%2000,(400*i)%1400,50,100*(1+S(i+t*35)))

Jun 24 2025 11:43 PM UTC

}// 88/140

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Negative space, left-moving triangles

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KilledByAPixel

remix of d/34034 by u/KilledByAPixel

function u(t) {

w=c.width|=t%=2
for(x.rotate(i=z=95);i--;)x.fillRect(1e3+z*S(t*3.14),(i+t)*z-w,i%2?w:-w,z)

Jun 22 2025 8:37 PM UTC

}// 90/140

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Split Lines Illusion 👀

u/cantelope

not sure i understand the "illusion" part
u/cantelope

nevermind. i looked at the others. looks side-to-side, then up-and-down

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rodrigo.siqueira

remix of d/33918 by u/rodrigo.siqueira

function u(t) {

x.fillRect(u=v=r=t/99-6,0,2e3,2e3)
for(k=i=70;i--;)for(j=k;j--;x.clearRect(980+u*k,540+v*k,2,2))u=C(P=i+v)+5*C(Q=r*i+u/5),v=S(P)+S(Q)*C(t)*5

Jun 21 2025 8:12 PM UTC

}// 140/140

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Orbits over the torus surface #torus

u/Odog8

Amazing!
u/joeytwiddle

donut universe theory

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Axioplase

remix of d/34037 by u/rodrigo.siqueira

function u(t) {

for(i=2e3;i--;x.fillRect(i*S(Y/z),t*60,1,z/9))for(z=0,j=9;--j;z+=F(Y=t/j-S(z+j)+j,X=i/20/j)+Y*F(Y)/9)F=Y=>S(X-Y)*C(X+Y)/5+S(X+Y)-S(Y)

Jun 24 2025 3:08 PM UTC

}// 133/140

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Abstract