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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Odog8

function u(t) {

t?e+=[-1,c.width=S=99,1,-S,d+=(a[e]^=1)?1:3][d%4]:a=Array(d=e=2e3)
for(i in a)x.fillRect(i%S,i/S,1,a[i])

Nov 21 2023 4:24 AM UTC

}// 104/140

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Langton's ant in 2 lines

u/Xen

nicely done!

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384.cz

remix of d/28918 by u/384.cz

function u(t) {

t>1&&(x.fillStyle="#07d")
x.fillRect(0,720-360*t,2e3,9)

Nov 22 2023 4:56 PM UTC

}// 55/140

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Estonia #flag

u/magna

2 chars shorter: x.fillStyle=t>1&&"#07d"
u/384.cz

thank you, magna
u/BriSeven

Oh no, politics on dwitter. HELL, HELL I TELLS YOU

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baon

remix of d/28899 by u/baon

function u(t) {

if (t>0) return
for(i=0;i<256;i++) for(j=0;j<256;j++)
a = 99%(i%j) ,x.fillStyle=R(a,a,a), x.fillRect(i*4+450, j*4, 4, 4)

Nov 22 2023 10:43 AM UTC

}// 120/140

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mod %

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baon

remix of d/28896 by u/baon

function u(t) {

if (t>0) return
for(i=0;i<256;i++) for(j=0;j<256;j++)
a = (i*j)**6 ,x.fillStyle=R(a,a,a,a), x.fillRect(i*4+450, j*4, 4, 4)

Nov 22 2023 10:37 AM UTC

}// 122/140

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baon

remix of d/28928 by u/baon

function u(t) {

if(t>2)return;r=_=>Math.random()*256>>0
for(k=0;k<1e4;k++)i=r(),j=r(),a=i>>i,
x.fillStyle=R(i,j,255,1-a),x.fillRect(i*4+450,j*4,4,4)

Nov 23 2023 10:31 AM UTC

}// 132/140

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baon

function u(t) {

if(t>2)return;r=_=>Math.random()*256>>0
for(k=0;k<1e4;k++)i=r(),j=r(),a=0,
x.fillStyle=R(i,j,255,1-a),x.fillRect(i*4+450,j*4,4,4)

Nov 23 2023 10:28 AM UTC

}// 129/140

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color mix

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baon

remix of d/28925 by u/baon

function u(t) {

if(t>2)return;r=_=>Math.random()*480>>0
for(k=0;k<2e4;k++)i=r(),j=r(),a=T(i**3+j**5)%256,
x.fillStyle=R(a,a,a,0.9),x.fillRect(i*4,j*4,4,4)

Nov 23 2023 9:54 AM UTC

}// 138/140

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baon

remix of d/28924 by u/baon

function u(t) {

if(t>2)return;r=_=>Math.random()*255>>0
for(k=0;k<1e4;k++)i=r(),j=r(),a=T(i**2*j**5),
x.fillStyle=R(a,a,a,0.5),x.fillRect(i*4+450,j*4,4,4)

Nov 23 2023 9:42 AM UTC

}// 138/140

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Dark Sky

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baon

remix of d/28922 by u/baon

function u(t) {

r=_=>Math.random()*255>>0
for(k=0;k<1e3;k++) i=r(),j=r(), a = (i&-i)^(j&-j),
x.fillStyle=R(0,0,0,a/256),t<5?x.fillRect(i*4+450,j*4,4,4):0

Nov 23 2023 8:57 AM UTC

}// 137/140

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better!

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baon

remix of d/28912 by u/baon

function u(t) {

if (t>0) return
for(i=0;i<256;i++) for(j=0;j<256;j++) a = (i&-i)^(j&-j),
x.fillStyle=R(0,0,0,a/256),x.fillRect(i*4+450,j*4,4,4)

Nov 23 2023 8:17 AM UTC

}// 127/140

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#coordinate #board