Random dweets | Dwitter

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.

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Nelno

remix of d/27458 by u/Nelno

function u(t) {

c.width=1920
for(i=2;i<5;i++){
m=i%2
x.fillRect((i-1)*450+S(t*2)*m*450,400+m*100+S(t)*100,50,100/(m+1)+(i+1)%2*140)}

Apr 27 2023 4:22 AM UTC

}// 116/140

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Xen

remix of d/3627 by u/veubeke

function u(t) {

x.beginPath(Z=499+(C(t/3)*19),x.strokeStyle=`hsla(${t*Z/9},50%,50%,.3)`)
x.ellipse(960,Z,t%.5*Z,50*t%Z*3,t/3,0,7)
x.stroke()

Dec 20 2017 12:16 AM UTC

}// 124/140

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nystrand

function u(t) {

eval(unescape(escape`𩡯𬠨𪐽𭰽𜡥𜰬𩰽𚁯𛁡𛁢𛁺🐶𙑢𚱩𙐳𚠷𛁚👺𛰸𞀸𚰮𜀳𛁖👩𙐳𚠸𞐩🐾𫠭𛐿𩰨𭀯𫠭𥠬𨠪𠰨𫰩𛑡𚡓𚁯𚐬𮠬𨐪𠰨𫰩𚱢𚡓𚁯𚐩𞡸𛡦𪑬𫁒𩑣𭀨𨐯𦠫𞐶𜀭𭰬𨠯𦠫𝐲𜀭𭰬𠠽𜠪𭰯𦠬𠠬𮀮𩡩𫁬𤱴𮑬𩐽𤠨𥠭𭰬𜠯𦠭𭰬𜐳𞐭𥠬𭰽𛠲𚐩𞱩𛐭𞰩𩰨𪐬𫠽𝠬𪐥𝰩`.replace(/u../g,'')))

Feb 26 2021 5:52 PM UTC

}// 140/140

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u/rodrigo.siqueira

Amazing! Welcome back, Nystrand. I still remember the B&W version of this one (/d/14899). And your dweet d/4388 (Sierpinski witchcraft) is one of the most amazing I've ever seen. Thanks.
u/nystrand

Thank you Rodrigo!
u/vain

hot stuff. like the colors and motion blur

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danny@hille.dk

remix of d/19959 by u/smtsjhr

function u(t) {

for(c.width|=j=9;j--;)for(i=4,x.moveTo(u=555*(T(t/4+j)),v=u/i+9*C(t));i--;x.lineTo(u+j+v*C(a=S(5*t+S(j)))*S(1.4*i),v+v*(i%2*S(a))))x.fill()

Sep 15 2020 4:48 PM UTC

}// 139/140

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Golfed remix

u/Xen

nicely done

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taupelink

remix of d/26194 by u/taupelink

function u(t) {

eval(unescape(escape`景爨洽琿〺㑥㐻洭ⴻ砮晩汬⠩⥸⹢敧楮偡瑨⡸⹦楬汓瑹汥㵒⡪㵭⨪⡭┮㜱⤬椽津ㄳ㔫㌰ⰲ攳⽪ⱃ⠸⩭⤪⨲⽩⤩ⱳ㵭☵㐴㼧慲挧㨧牥捴✬硛獝⠹㘰⬨漽㐪楞権⩃⡭⤬㔴〭漪匨洩Ⱪ⩓⠴⩭⤪⨲ⱪⱪⴱ⵭┸⼲⤻`.replace(/u([^D].)/g,'$1%')))

Oct 15 2022 9:36 PM UTC

}// 140/140

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d/26305

u/taupelink

I found this color pattern entirely by accident. If you replace ".71" with any other value, you're likely to lose the pattern

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lowpoly

function u(t) {

c.width=l=2e3;for(Y=0;Y<2e3;Y+=9,l=t+Y/99)for(w=5;w--;)x.fillRect((S(l)*Y/98-w/2+20)*50,Y,w*50,2e3,x.fillStyle=`hsl(${Y*4},100%,${5-w}0%)`)

Jan 4 2018 2:02 AM UTC

}// 139/140

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Another old effect

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ximavus

function u(t) {

z=Math.random
x.fillStyle=R(z()*255,z()*255,z()*255)
x.fillRect(900+S(t*35)*t*t,540+C(t*35)*t*t,t*9,t*9)

Oct 11 2025 8:10 AM UTC

}// 104/140

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Color spiral

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rodrigo.siqueira

remix of d/31977 by u/taupelink

function u(t) {

f=u=>(((u%8-4)**2)-4)**2;g=n=>!(f(X/n)+f(Y*n/6)&672);for(i=2e4;i--;x.fillRect(24*X+384,23*Y,g(3)|g(i),g(i)|g(2)))if(t<4)X=i*t%48,Y=X*i%48

Jul 23 2024 2:10 PM UTC

}// 137/140

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Patterns

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lineranch

function u(t) {

x.arc(960,540,0,0,0)
x.arc(960+S(t)*300,540+C(t)*300,50,0,2*Math.PI) 
x.fillStyle='gold '
x.fill()
x.stroke()

May 29 2019 12:08 AM UTC

}// 110/140

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danny@hille.dk

function u(t) {

for(c.width|=w=i=700;i--;)x.fillRect(960-C(t-i/99+C(t-i/60))*(i/5),w-i,10-i/6,1-i/w);x.fillRect(920,w,90,w)

Mar 17 2023 9:31 PM UTC

}// 107/140

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As the flame is smothered and darkness descends, A poignant reminder that all things must end, Yet amidst the gloom, a glimmer of hope, A new spark waiting, ready to cope, For even in death, life finds a way, And the cycle of light begins anew each day.

u/taupelink

☮️☮️☮️
u/tomxor

Effective
u/cantelope

looks like sin, but then again everything can