Top dweets of all time

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: #Food

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Detomon

function u(t) {

c.width=c.height=32;for(i=0;i<32;i++)for(j=0;j<32;j++){x.fillStyle=R(S(i/32+t+3.14)*255,S(j/32+t)*255);x.fillRect(i,j,1,1)}

Feb 22 2017 8:55 AM UTC

}// 125/140

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u/iverjo

#plasma

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vanita5

function u(t) {

c.width=w=1280;for(i=k=512;i-=1;){for(y=k;y-=1;){i&y||x.fillRect((w/4)+i-~y/2,k-y,2,2)}}

Feb 22 2017 7:19 AM UTC

}// 88/140

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u/iverjo

#sierpinski

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maxhudson

function u(t) {

π=Math.PI;c.width=w=1920;for(i=1;i<10;i++){x.arc(w/2,w/3,(t*70*i)%w/1.8,0,π*2);x.lineWidth=5;x.strokeStyle=R(t*100%255,0,200);x.stroke()}

Feb 22 2017 7:10 AM UTC

}// 137/140

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faget

function u(t) {

var l=1.5,h=S(t),q=640*h*l,j=h*100,f=870;jx=j>0?j:-j,p=new Image();p.src="//imgur.com/ceKPS4m.png";x.drawImage(p,jx+f,jx,(f*h)*l,q>0?q:-q)

Feb 22 2017 6:07 AM UTC

}// 138/140

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recursive

function u(t) {

for(c.width|=d=0;d<256;d+=.1)x.lineTo(a=7*d*C(d+t)+960,b=7*d*S(d)+540),x.lineWidth=(256-d)**2>>10,x.stroke(),x.beginPath(),x.moveTo(a,b)

Feb 22 2017 5:15 AM UTC

}// 136/140

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fufuhaaa

remix of d/758 by u/mvv

function u(t) {

c.width=99;v=x.n=x.n||[4,9,3,5,1];for(i=0;i<5;i++){s=v[i];z=v[i+1];if(s>z&&t%1<.01){t+=.01;v[i]=z;v[i+1]=s}x.fillRect(i*20,-v[i]*10,20,55)}

Feb 22 2017 4:17 AM UTC

}// 139/140

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Bubble sort, somehow in <140 chars.

u/Pol1y@

hello

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pmg

function u(t) {

c.width=600;x.font='30px a';for(i=0;i<20;i++){for(j=0;j<11;j++){x.fillText('◣◤'.substr(((2+2.5*S(i+j+t*6|0))|0)*2,2),i*30,j*30);}}

Feb 22 2017 4:07 AM UTC

}// 130/140

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donbright

remix of d/479 by u/lionleaf

function u(t) {

c.width=256;for(i=128;i--;)for(j=128;j--;){r=i*i-j*j;g=2*i*j;b=i*i+j*j;x.fillStyle=R(0,(t*32+g)%256,0);x.fillRect(64+i,8+j,1,1)}

Feb 22 2017 3:58 AM UTC

}// 128/140

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Circles and Squares style pseudo fractal inspired by "green quadrance" from Wildberger's chromogeometry (x*x-y*y)

u/donbright

oops, 2*x*y

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fufuhaaa

function u(t) {

if(c.width>568){c.width=568;}x.fillText(String.fromCodePoint(0x1F300+(Math.random()*0x130)|0),Math.random()*568,Math.random()*320);

Feb 22 2017 2:52 AM UTC

}// 131/140

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caleb

function u(t) {

b=1920/c.offsetWidth;x.font=b*30+"px monospace";c.onmousemove=(e)=>{x.clearRect(0,0,1920,1920);x.fillText("Hi",e.clientX*b,e.clientY*b);}

Feb 22 2017 1:52 AM UTC

}// 137/140

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u/lionleaf

Haha, awesome! Thought it was blank until I saw "onmousemove" and moved my cursor into it!