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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katkip

remix of d/34077 by u/katkip

function u(t) {

with(x)for(c.width|=i=50,font='19em impact';i--;)fillStyle=R(5*i*t,99+99*S(t+i),255,.3),fillText('js1024',520+S(t+i/5)*i*9,400+C(t+i)*i*3)

Jul 2 2026 2:19 PM UTC

}// 138/140

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#js1024 edition 2026 STARTED!! Theme: DREAMING. Details: https://js1024.fun/

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KilledByAPixel

function u(t) {

eval(unescape(escape`󭌿󠝛󪭝󚼽󞜫󪬺󠬽󦽷󟜳󜌰󛍷󛍪󟜱󛍁󟝛󞌱󜌬󛝷󧝝󒭦󟝣󛭷󪝤󭍨󯌽󩜽󜌊󩭯󬬨󪜽󪬫󜜻󪜭󛜻󩜽󣝡󭍨󛭭󨝸󚍥󛍡󚜩󮌮󩭩󫍬󤭥󨽴󚍡󟝁󦽩󧜬󜜰󜼰󛝩󚬵󜌬󨬽󠭛󪝝󛌵󜌩󛍦󟝍󨝴󪌮󫝩󫬨󩬬󨜫󨬩󒭯󫭭󫽵󬽥󩍯󭽮󟝟󟜾󠭛󠝛󪭝󟝥󛍪󧜽󠭛󠝛󚼫󪭝󟜭󭼬󪭝󟝦󟭥󙬦󩬭󩜻`.replace(/u../g,'')))

Jul 2 2026 12:52 AM UTC

}// 139/140

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Stacking Game 📦 #interactive

u/KilledByAPixel

click when block is over top of previous. reload to try again. can you get to the top?

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rodrigo.siqueira

remix of d/34918 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert(`
for(𝕏=X=Y=i=4e4;i--;𝕏=X,x.fillRect(Y*3900-2500,X*2000+1150,t<1,.1))X=S(X*X-Y*Y)+.28,Y=C(2*𝕏*Y+i%2/2+C(t+i%196)/26)

Jul 2 2026 3:49 PM UTC

}// 139/140

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Double

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taupelink

remix of d/35708 by u/taupelink

function u(t) {

for(i=z=4e3;i--;x.fillRect(320*t,i/3,z+=9+9*C(z*C(z+t/z*4)+i/r),.5))x.fillStyle=R(r=320-(z=9+7*S((z+2*S(z/2+t)^i/z/6)/12))**6/2e4,r+8*z,r*z)

Jun 30 2026 12:33 PM UTC

}// 140/140

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d/35747

u/Axioplase

Damn.... Looks like a frozen rocky mountain.
u/rep_movsd

Looks like some dam and bridge being built inthe Himalayas

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KilledByAPixel

remix of d/32945 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`󩭯󬬨󨼮󭽩󩍴󪌽󭼽󞜹󛍶󟜵󜌬󭌽󭌪󭬭󭬬󪜽󝭥󜼻󪜭󛜻󮌮󩭩󫍬󤭥󨽴󚍩󙝷󛍩󛽷󯌰󛌱󛌲󛝚󛽶󚜩󩭯󬬨󦜽󭬬󨜽󪜥󭼯󭬭󜜬󦌽󭌬󦬽󨬽󛝩󛼵󩜳󞼫󚽚󟍷󙭍󨝴󪌮󪍹󬍯󭌨󦬭󭬬󦌬󦜫󭌩󟬨󭌼󜌿󜜮󜼺󭌪󜼩󙬦󦜾󛝃󚍘󛼹󧭚󛼷󚜪󜬱󯍘󙭙󙭚󙬷󯍼󨜭󜜦󙬨󨜽󨬽󜜩󞽙󚼽󨬩󦌫󟝡`.replace(/u../g,'')))

Jun 29 2026 5:58 PM UTC

}// 140/140

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Dr Strangecode ✈️💣

u/SockTaters

if you squint you can see his little cowboy hat
u/lewdev

😏 This gives "killed by a pixel" a new meaning.
u/katkip

i can feel the radiation

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taupelink

remix of d/35678 by u/taupelink

function u(t) {

a=z=>z*z;f=u=>Math.max(a(u%10-5),2*a(u%6-3));for(i=k=1e4;i--;x.fillRect(960+r*S(h=i/k*6.3),405+r*C(h),t,!(f(6*t**.5)+f(h*9.55)&23)*t))r=90*t

Jul 2 2026 3:52 AM UTC

}// 140/140

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d/35754 👀

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katkip

remix of d/35758 by u/katkip

function u(t) {

for(c.width^=0,i=13e4;X=i%480,Y=i/480,i--;)(x.globalAlpha=1-(V=C(t)*S(X/7)*S(Y/6)+S(t)*S(X/6)*S(Y/7))*V*99)>0&&x.fillRect(X*4,Y*4,9,9)

Jul 2 2026 5:04 PM UTC

}// 134/140

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improvement

u/katkip

lowkey really hypnotizing

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katkip

function u(t) {

for(c.width^=0,x.fillStyle='#000',i=13e4;X=i%480,Y=i/480,i--;)(V=C(t)*S(X/7)*S(Y/6)+S(t)*S(X/6)*S(Y/7))*V<.002&&x.fillRect(X*4,Y*4,9,9)

Jul 2 2026 4:58 PM UTC

}// 135/140

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Chladni plates https://www.shadertoy.com/view/clV3WK

u/katkip

i just realized i forgot "x.fillStyle='#000'" there

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andrea270872

function u(t) {

c.width+=0 
for(j=5;--j;){
x.fillStyle=`#12${2*(5-j)}`
for(i=99;i--;)
x.fillRect(i*20,800-(j+S(j/3+t))*99+(S(t*j+i/j)+C(t+j))*16,20,1e3)}

Jun 30 2026 5:48 PM UTC

}// 137/140

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Waves test 1

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rodrigo.siqueira

function u(t) {

x.fillRect(x.globalAlpha=.3,0,n=3e3,n)
for(X=Y=i=n;i--;x.clearRect(X*1600+1300,Y*999+140,4,4))
X=X*X-Y*Y+S(t/3+i%30/6)/4,Y=C(2*n*Y-.9),n=X

Jul 1 2026 1:54 PM UTC

}// 138/140

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Swarm of particles