Dweets awesomed by u/eviltoad

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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Current theme challenge: #ScaryMovies

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Xen

function u(t) {

for(Z=i=199;i--;x.strokeRect(X,Y,Z,Z))x.fillRect(X=9e2+C(i-t)*i*6,Y=4e2+S(i-t)*i*4,Z,Z),x.fillStyle=`hsla(${4*t*i},90%,50%,.05)`

May 21 2018 5:02 PM UTC

}// 128/140

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u/DataMeta

completely mesmerizing
u/aleamb

awesome!
u/fourier.space

Has the effect that if you stare at it for a long time, everything else you look at afterwards becomes twisty
u/katkip

#xweet

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generative-eu

function u(t) {

c.width=1920;x.lineWidth=10;for(i=0;i<40;i++){s=S(i/6);x.beginPath();x.arc(960,540,15*i,a=s*t,a+2);x.strokeStyle=R(0,0,0,.5+s/3);x.stroke()}

May 21 2018 4:23 PM UTC

}// 140/140

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kcsongor

function u(t) {

c.width=1920;i=48;while(i-->0)for(j=0;j<27;j++){r=i|j+t*80;d=40;x.fillStyle=R(S(r*(S(t)+1)/10)*200,C(r)*100,100);x.fillRect(i*40,j*40,d,d)}

May 20 2018 10:06 PM UTC

}// 139/140

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u/Xen

lots'a style
u/DataMeta

Looks like what going hot sim into the matrix feels like. Ultra cool

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Friend

remix of d/8112 by u/GeorgesAbitbol

function u(t) {

for(j=5;j--;)
for(i=9;i--;)x.fillRect(958+80*S((j+i)*t)+170*(4-i),170*(2-j)+538+80*S((i+1)*t+1),4,4)
x.fillStyle="hsl("+t%5*71+",100%,50%)"

May 18 2018 5:26 PM UTC

}// 139/140

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hollo47

function u(t) {

c.width|=0;
for(i=-50;i++<50;)
for(j=1;j++<150;)f=33e3*i,h=j*58,
g=60e3+S(j/11+t*2)*9999+C(i/3+t)*9e3,
x.fillRect(960+f/h*3,540+g/h*3,1,1);

May 17 2018 4:10 PM UTC

}// 139/140

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#ocean waves

u/joeytwiddle

Nice, dots on the beach. I used 5,5 so I could see the dots more clearly, and t*=15 for speed

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jylikangas

function u(t) {

for(x.fillRect(0,i=-9,W=2e3,W);++i-9;)for(j=28;j-->9;x.clearRect(960-i*700/j,700-W/j*T(t/2-(q<9||q)/99),300/j,150/j))q=T(i*j+t/j)

May 15 2018 8:12 PM UTC

}// 129/140

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Shattering floors

u/jylikangas

Inspired by http://sid766.tumblr.com/post/172062394600

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firegodjr

remix of d/8105 by u/magna

function u(t) {

x.putImageData(x.getImageData(0,10,1920,1080),0,0)
for(r=i=2e3;i-=10;r+=r*t|4)x.fillText('╲╱'[r&1],i,1070)

May 15 2018 6:34 PM UTC

}// 106/140

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Continuous maze

u/magna

Yay!
u/joeytwiddle

I see a #shiny pattern which disappears when I go to fullscreen. But not on retina displays.
u/mxfh

More maze-like though. If you're lucky you get a tunnel. https://en.wikipedia.org/wiki/Truchet_tiles#…
u/mxfh

https://en.wikipedia.org/wiki/Truchet_tiles#…

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Qwitter

remix of d/6106 by u/Qwitter

function u(t) {

s=500;c.width=2*s;q=p=0;for(i=9*s;i--;x.fillRect(s+s*C(q+t),s+s*S(p+t),5,5)){N=Math.floor(3*Math.random());p=p/2+N*N%2;q=(q+N*(N+1))/2;}

Jan 19 2018 3:35 PM UTC

}// 136/140

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zanella

function u(t) {

r=540;x.fillStyle='#00000005';x.fillRect(0,0,2e3,2e3);x.fillStyle='#0f0';x.beginPath();x.moveTo(960,r);x.arc(960,r,r*5,t,t+.1);x.fill()

Jan 19 2018 3:26 PM UTC

}// 135/140

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u/donbright

great minds think alike, https://www.dwitter.net/d/2408
u/iverjo

#radar

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mrbhawk

function u(t) {

for(c.width|=0,a=31;--a;){
x.font='99px monospace'
x.fillText(new Date().toLocaleTimeString('fr-FR'),740+C(t/a)*740,570+S(t/a)*500)}

Jan 19 2018 2:24 PM UTC

}// 132/140

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