Dweets awesomed by u/Lynx

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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pavel

function u(t) {

for(i=c.width|=0;i--;x.fillRect(X,540+200*C(a),-150,7))X=i%960*2,x.fillStyle=`hsl(${q=X/8+60*t},69%,${42+32*S(a=(q/32%1+(i>960))/.32)}%`

Dec 4 2020 8:45 PM UTC

}// 136/140

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Ribbons

u/pavel

Dynamically swapping the draw order to get proper overlapping. Change i>960 to 1 or 0 to see how this works.
u/Qwitter

cool, and thanks!

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Lynx

function u(t) {

for(i=0;i<100;x.fillStyle=R(127,++i*2,i)){y=540+0.5*7.5*t*t*(i%2?-1:1);x.fillRect(i*7.5*t,y,20,20)
x.fillRect(1920-i*7.5*t,y,20,20)}

Dec 4 2020 2:38 PM UTC

}// 132/140

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fun with physics formulas (newbie to dwitter)

u/joeytwiddle

When you pop into the supermarket because you need two eggs

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rodrigo.siqueira

remix of d/20902 by u/taupelink

function u(t) {

for(i=996;i--;x.fillRect(250*X,250*Y,2e3,1))X=t/2,Y=i/230,h=300*S(Y%S(m=X/2%S(p=C(q=Y*S(X/3))*2)*2+T(i*i**t)/6)),x.fillStyle=R(h*p,h*m,h*q)

Dec 4 2020 5:29 AM UTC

}// 139/140

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Noisy signal

u/taupelink

whoa
u/magna

WOWZA!
u/SMON

haha...not sure why - I guess aliasing - but it sparkles when I scroll :D

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Xen

remix of d/20905 by u/solendil

function u(t) {

eval(unescape(escape`𩡯𬠨𨰮𭱩𩁴𪁼👩🐶𞐬𮀮𩱬𫱢𨑬𠱯𫑰𫱳𪑴𩑏𬁥𬡡𭁩𫱮🐧𮁯𬠧𞱩𛐭𞱸𛡦𪑬𫀨𬀽𫡥𭰠𤁡𭁨𜡄𛁰𛡡𬡣𚁓𚁷🐨𭀪𪐯𞐹𛑴𚠳𞐩𛰹𚐪𝠶𜀫𞐶𜀬𠰨𭰯𜰩𚠲𝐵𚰵𝀰𛁓𚀭𭰪𜠩𚠳𞐫𜐹𞐭𪐯𜠬𜀬𝰩𚐩𮀮𩡩𫁬𤱴𮑬𩐽𨁨𬱬𚀤𮱩𚱩𯐬𞐰𙐬𝐰𙐩𨀻`.replace(/u../g,'')))

Dec 3 2020 6:14 PM UTC

}// 135/140

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#waitforit

u/danny@hille.dk

Love it!

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solendil

function u(t) {

G=(a,b,c)=>{x.fillStyle=`hsl(${a},80%,${b}%,${c}`
x.fill(p=new Path2D,p.arc(1e3,C(t*1.4)*500+500,1e5,t,t+3.14,a))}
G(0,0,.03)
G(t*99,50,.01)

Nov 30 2020 3:58 PM UTC

}// 140/140

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Neon

u/Xen

nice style!
u/MAxSaL

This could have been a Windows XP screen saver.

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solendil

function u(t) {

eval(unescape(escape`𠐽𭀿𦰮𛠮𠐬𦱘𛁙𛁚𛁗𧑝𞡛𦱩🐳𧑝𒡊🐨𚐽🡍𨑴𪀮𬡡𫡤𫱭𚀩𚠨𜑥𜰭𤠩𒡦𫱲𚁒🐵𝀵𚡩𚰫𚠪𛐮𝠻𦀽𢠨𦐽𢠨𚐩𛁚👘𚱒𛁗👙𚱒𛁁𛡦𪑮𩀨𚁛𮀬𮐬𮠬𭱝𚐽🡘🁺𙡚🡸𙡙🁷𙡗🡹𚐻𚐻𮀮𩡩𫁬𤱴𮑬𩐽𨁨𬱬𚀤𮱘𚱙𯐠𞀰𙐵𜀥𨀊𮀮𩡩𫁬𤡥𨱴𚁘𚰵𜀰𛁙𛁒𛁒𚐊`.replace(/uD./g,'')))

Nov 30 2020 9:55 AM UTC

}// 140/140

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Statistical Geometry

u/katkip

very beautiful
u/rep_movsd

Like African pacthwork quilt

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taupelink

remix of d/20630 by u/taupelink

function u(t) {

r=Math.random;for(i=k=214;i--;x.strokeRect(k*X,k*Y,i/t,k/t))X=r(Y=r()*5)*9,h=k*S(S(Y*.7)%C(p=S(q=1.5-X/3)*q+2)),x.strokeStyle=R(h*q,h*p,h*Y)

Nov 22 2020 7:22 PM UTC

}// 140/140

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d/20784

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Xen

function u(t) {

t?x.strokeRect(900,499,199,199):X=Y=99
x.drawImage(c,C(X+=C(Y^t))*9,S(Y+=S(X^t))*9),x.strokeStyle=`hsl(${X*Y*t%1e3} 50%50%`

Nov 22 2020 3:47 PM UTC

}// 123/140

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Weird-Wanderer 123

u/etury

You're amazing, truly worthy of respect
u/Xen

or a beer... i'll take beer :-P

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danny@hille.dk

remix of d/20618 by u/danny@hille.dk

function u(t) {

for(c.width=433,p=1;p++<6;)for(i=400;i--;)x.fillStyle=`hsla(${p*t*5},99%,50%,.4`,x.fillRect(i,m=C(i/(9*p+96)+t)*p*S(+p+S(i/66))*9+57,1,m)

Nov 16 2020 9:55 PM UTC

}// 137/140

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u/ciaccodavide

Smooth!

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femto113

function u(t) {

c.width=1920
X=960,Y=540,P=Math.PI,N=t/P%32,p=P/N
for(i=0;i<P;i+=p)x.fillRect(X+Y*(S(i+P)-S(i))/2*S(t+i),Y+Y*(C(i+P)-C(i))/2*S(t+i),19,19)

Nov 14 2020 8:31 AM UTC

}// 138/140

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linear motion rolling circle illusion

u/katkip

#illusion
u/DataMeta

nicely done
u/pavel

If you delete c.width=1920 you can see only the first dot move linearly
u/femto113

curves are a side effect of changing N with t, if you use a fixed value like N=16 you get straight lines

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