Top dweets this year

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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ximavus

function u(t) {

z=Math.random
x.fillStyle=R(z()*255,z()*255,z()*255)
x.fillRect(960+S(t)*500,540+C(t)*500,90,90)
x.drawImage(c,99*z()-49,99*z()-49)

Oct 27 2025 9:24 AM UTC

}// 131/140

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Shaking color circle

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gpolonus

remix of d/17824 by u/gpolonus

function u(t) {

f=(a,y)=>x.fillRect(a,y,9,9)||f
if(!t)onmousemove=e=>((a,y)=>f(a,y)(2e3-a,1e3-y)(a,1e3-y)(2e3-a,y))(e.x*3.4,e.y*3.4)

Oct 27 2025 4:44 AM UTC

}// 116/140

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Same thing, fewer characters

u/ximavus

Awesome!
u/ximavus

Also creative golfing with the f=(a,y)
u/aleamb

love it

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lewdev

remix of d/34346 by u/danny@hille.dk

function u(t) {

onmousemove=e=>x.lineTo(e.x*c.width/innerWidth,e.y*c.height/innerHeight),x.stroke()

Sep 25 2025 9:24 PM UTC

}// 83/140

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Paint that works in fullscreen too

u/cantelope

👍
u/ximavus

here's a 32 character golf: change the c.width/innerWidth and c.height/innerHeight with 3.4
u/ximavus

I checked how much it is and its actually 3.386243386243386 but 3.4 is pretty close
u/lewdev

I didn't want a hard-coded version because this solution is much better than this d/34332 which uses getBoundingClientRect to find the accurate position of your mouse no matter the size of your canvas. But I'll keep that in mind for future dweets.
u/ximavus

ok

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KilledByAPixel

remix of d/34231 by u/KilledByAPixel

function u(t) {

with(x)for(t||translate(960,540),j=6;j--;)for(i=96;--i;fillRect(T*S(i+i*t/T),-0,5,T=5e3))fillStyle=`hsl(${i*t/4} 99%${i}%`,rotate(Math.PI/3)

Sep 16 2025 4:12 PM UTC

}// 140/140

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Pinwheels 🌸

u/ximavus

I put Math.PI/Math.E in the rotate function at the end and it looks awesome
u/ximavus

You can also change the Math.PI/3 to .1 and it looks the same but smaller

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rodrigo.siqueira

remix of d/34288 by u/DazeWare

function u(t) {

for(i=2e3;i--;x.fillRect(i,t*90,.4,z/2))for(z=0,j=9;--j;
z-=+F(Y=S(t/j)*j/3-2-S(z+j)*5+j,X=i/9/j)+Y/5)F=k=>S(Y)*2-S(X)/3+S(X/6)

Sep 14 2025 2:22 PM UTC

}// 127/140

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Details of Suminagashi technique

u/ximavus

Suminagashi means floating ink btw

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rodrigo.siqueira

remix of d/34248 by u/rodrigo.siqueira

function u(t) {

for(x.fillRect(0,0,i=2e4,i),h=540;i--;)l=i**2+t/9,g=S(i)/2,Z=C(l)/g+3+l/(t+.5)**20,s=(6/Z+2)%i,x.clearRect(960+S(l)/g/Z*320,h+C(i)/Z*h,s,s)

Sep 8 2025 10:39 AM UTC

}// 139/140

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Torus formation intro #torus

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HardlyProductive

function u(t) {

for(x.fillStyle="#0001",x.fillRect(0,0,2e3,2e3),x.fillStyle='red',i=38;i--;m=t+i,k=450*C(m),x.fillRect(960+k*C(m*2/3),540+k*S(m*2/3),9,9));

Sep 6 2025 5:16 AM UTC

}// 139/140

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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

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KilledByAPixel

remix of d/34219 by u/KilledByAPixel

function u(t) {

for(k=2e3;k--;x.fillRect(...j<9?[T+k+S(t)*300,T=500,2,200]:[0,T+T*S(j+t)+k%99,2e3,2]))j=k/99|0,x.fillStyle=`hsl(${j*T} 99%${S(k%99/32)*55}%`

Aug 19 2025 5:07 PM UTC

}// 140/140

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Rasterbar #Default

u/UEZ

#C64