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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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rodrigo.siqueira

remix of d/34635 by u/rodrigo.siqueira

function u(t) {

x.fillRect(x.globalAlpha=.05,0,2e3,2e3)
for(i=950;i--;)for(j=17;j--;x.clearRect(960+S(k=i/4)*r,540+C(k)*r+j*60-300,3,3))r=j**1.3*9|T(i*j*t)

Dec 23 2025 1:27 AM UTC

}// 139/140

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Decorated Cosmic Christmas tree #christmas #xmas #tree

u/ximavus

yessssssssssssssss last day of school over!

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rodrigo.siqueira

remix of d/34609 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert(`
for(𝕏=X=Y=i=4e4;i--;𝕏=X,x.fillRect(Y*700+760,X*700+500,t<1,.1))X=T(X*X-Y*Y)+.3,Y=T(2*𝕏*Y+.15+S(t+i*.98+S(i%1.2))/9)

Dec 15 2025 3:34 PM UTC

}// 140/140

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Organic storm

u/joeytwiddle

#organic #virus #cell

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eftko

remix of d/14471 by u/katkip

function u(t) {

c.width*=1;x.beginPath();x.lineWidth=9;for(i=5;i--;)x.arc(960,540,300,i*t/2+t,i*t/2+t+C(C(t)*1.5)*2),x.stroke()

Dec 24 2025 3:37 PM UTC

}// 111/140

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ximavus

function u(t) {

s=T(t)
z=Math.random
t?x.reset(onmousemove=e=>v.push([e.x*3.4,e.y*3.4])):v=[]
for(a of v)x.fillRect(a[0]+=z()*s-s/2,a[1]+=z()*s-s/2,9,9)

Dec 22 2025 7:25 AM UTC

}// 136/140

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drawing dissolve! thanks to u/lewdev for the for(a of v) golf

u/lewdev

neat!

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KilledByAPixel

remix of d/14922 by u/KilledByAPixel

function u(t) {

for(i=9;i--;)x.fillRect(0,(i-1)*167,i?2e3:750,i?83:700)

Dec 20 2025 4:09 PM UTC

}// 55/140

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The Redacted States of America ⬛

u/ximavus

as a nonamerican i dont exactly understand
u/ximavus

ah wait I get it
u/KilledByAPixel

wait, how did you know this is american flag?
u/ximavus

the redacted states of America. its similar
u/cantelope

$3,000 USD reward for information leading to the arrest of this dweet's author

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rodrigo.siqueira

remix of d/34601 by u/rodrigo.siqueira

function u(t) {

for(𝕏=X=Y=i=3e4;i--;𝕏=X,x.fillRect(Y*480+(i%3+1)*540+60,X*800+250,t<1,.1))
X=S(X*X-Y*Y/(i%3+1))+.34,
Y=T(𝕏*Y-.1+S(i/1.01+S(i+t)%1)/4)

Dec 13 2025 8:42 PM UTC

}// 133/140

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3 Organic Alien Structures

u/cantelope

#structures
u/aleamb

Reminds me "Pillars of Creation"
u/ximavus

yeah me too

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rodrigo.siqueira

remix of d/34598 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert()`
for(𝕏=X=Y=i=2e4;i--;𝕏=X,x.fillRect(2350+Y*3600,60-X*6e3,t<1,.1))X=S(X*X-Y*Y*.6),Y=C(2*𝕏*Y+1.9)-S(i-t)/(i%19+.05)/4

Dec 9 2025 2:58 AM UTC

}// 140/140

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Quick sketch

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KilledByAPixel

function u(t) {

for(i=3e3;i--;x.fillRect(960+r*S(a=i/19),540+r*C(a),S(i+t*S(t))**8,t))r=t*60

Nov 30 2025 6:37 PM UTC

}// 76/140

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Hypnotic Swirl 👁️

u/New_Core

r=t*t*2 is pretty nice
u/ximavus

#illusion nice one
u/ximavus

I made this snippet though its 144/140 chars: z=_=>S(t+_*Math.random())*255 for(i=3e3;i--;){r=t*t*S(t);x.fillStyle=R(z(i),z(i),z(i));x.fillRect(960+r*S(a=i/19),540+r*C(a),S(i+t*S(t))**8,t);}
u/ximavus

based on this one of course

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rodrigo.siqueira

remix of d/34609 by u/rodrigo.siqueira

function u(t) {

for(𝕏=X=Y=i=3e4;i--;𝕏=X,x.fillRect(Y*540+(i%3+1)*600-320,X*600+280,t<1,.1))
X=S(X*X-Y*Y/(i%3+1)+3)+.5,
Y=T(𝕏**2*Y*2+S(i/1.01+S(i+t))/4)

Dec 16 2025 12:18 PM UTC

}// 135/140

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3 symmetrical elements

u/tomxor

The 3rd one looks like a manta ray

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lewdev

remix of d/34602 by u/lewdev

function u(t) {

eval(unescape(escape`󬬽󣝡󭍨󛭲󨝮󩍯󫜻󠜽󬼽󟭸󛭦󪝬󫍓󭍹󫍥󟝳󒭁󨌣󜌰󜌱󨌊󭌿󮌮󩭩󫍬󤭥󨽴󚌰󛌰󛌲󩜳󛌲󩜳󚜺󩬽󫭥󭼠󠝲󬭡󮜨󞜹󚜮󩭩󫍬󚌩󛭭󨝰󚍟󟜾󦽲󚌩󚬲󩜳󛍲󚌩󚬱󩜳󧜩󒭁󨌣󜍦󜍠󒭩󟜰󞽦󫽲󚍡󘍯󩬠󩬩󮌮󩭩󫍬󥍥󮍴󚌰󛍃󚍩󚭴󚽩󚜪󞜹󚽡󦼰󧜬󤼨󪜪󭌫󪜫󚼩󚬹󞜫󨝛󜝝󚜻`.replace(/u../g,'')))

Dec 15 2025 3:22 AM UTC

}// 138/140

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Spinning Zeroes