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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robbyg

function u(t) {

w=c.width=192,t||(y=[54]);y.push(Y=y.pop(),Y+(Math.random()-.5)*4);y=y.slice(-w);for(i=y.length;i--;)x.lineTo(i,y[i]);x.stroke()

Mar 19 2018 6:01 PM UTC

}// 128/140

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Inspiration from @alien https://www.dwitter.net/d/5150

u/alien

this is nice, i guess i was trying to force it too much by using sine waves function...

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dee-gomma

remix of d/34014 by u/dee-gomma

function u(t) {

for(j=640,t=frame;j--;x.fillRect(j,t,1,(320-j-t)**2<2*j*t))f=t>>6,x.fillStyle=f--%9&&1303758982&(1<<S((j>>6)*.45-.5)/.3<<4*f)?"#FB6":"#920"

Jun 20 2025 2:52 PM UTC

}// 139/140

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More golfed self-portrait / profile image

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Xen

remix of d/3101 by u/kchplr

function u(t) {

f=frame
'p}¶¼<¼¶}p'.charCodeAt(f/8|0)&1<<f%8|0&&x.fillRect((f/8|0)*9*11,f%8*9*11,99,99)

Aug 24 2017 11:50 PM UTC

}// 89/140

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just_me_7k

function u(t) {

for(i=32;i--;x.fillRect(i*70,540,50,-S(t*9+i)*99))x.fillStyle=R(i*16,255-i*16,51)

Jun 18 2025 4:31 PM UTC

}// 81/140

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Music Bar

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DragonKyn

function u(t) {

c.width|=0
for(i=5e3;v=i--/800;){
s=4*S(t)*S(9*v)
q=s*2
s*=1-q/3*(1-q/25)
k=100*(4-q*(1-q/14))
x.fillRect(900+k*C(s+=v+t),520+k*S(s),11,9)
}

Feb 21 2018 8:06 PM UTC

}// 140/140

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u/Bugsy

Nice! Any particular reason you didn't initialize i to 6e3? That'd take care of that gap you have in one of the tendrils
u/joeytwiddle

#spiral

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danny@hille.dk

remix of d/20651 by u/danny@hille.dk

function u(t) {

for(w=c.width=50*(9+S(t))|0,p=1;p++<6;)for(i=w;i--;x.fillRect(i,m=S(i/33+t)*4+S(i/99+t*2+p)*39+p+79,1,m))x.fillStyle=`hsl(${p*t*5},99%,50%`

Nov 20 2020 9:41 PM UTC

}// 139/140

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u/Xen

smooth

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magna

function u(t) {

x.fillRect(0,0,w=c.width=960,w)
x.strokeStyle=R(w,w,w,.2)
for(i=399;i--;x.stroke())x.arc(480+i,270-i,(i/29)**S(t)*119,~x.beginPath(),7)

Nov 3 2018 10:16 PM UTC

}// 135/140

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Xen

function u(t) {

for(i=1e3;i--;)x.fillRect(i*7+C(199*t/i*3)*4,t*99,3,1)

Sep 11 2018 3:19 PM UTC

}// 54/140

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u/donbright

at full screen this is a bizarre optical illusion. fascinating

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BalintCsala

function u(t) {

c.width=500
x.scale(20,20)
for(X=20;X--;)for(Y=20;Y--;x.fill())for(i=6,x.beginPath();i--;)x.lineTo(C(a=i*1.04+S(t))+X*2+Y%2,S(a)+1+Y*1.7-1)

Sep 11 2018 7:13 PM UTC

}// 139/140

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Works everywhere

u/joeytwiddle

Very good!
u/joeytwiddle

Inspired by: https://twitter.com/beesandbombs/status/1006…
u/f8f82804

#beesandbombs

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Xen

remix of d/12619 by u/Nexrem

function u(t) {

z=950;for(c.width|=i=2e3;i--;x.lineTo(z+C(i-1)*z,540+S(t+i/3)*540))x.moveTo(z+C(i)*z,540+S(t-i/.6)*540);x.stroke()

Mar 5 2019 1:24 PM UTC

}// 114/140

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u/Nexrem

Nice, I tried something similar but didnt have enough chaes to scale the timing down for a smooth animation