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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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magna

remix of d/2622 by u/magna

function u(t) {

for(i=c.width=w=192;i--;)for(j=w;j--;b=i%8^(X+Y&1^f)*7,'ĒőäƈÓäŉĊ'.charCodeAt(j&7)-w&1<<b&&x.fillRect(i,j,1,1))X=i>>3,Y=j>>3,f=t*X/Y&1

Apr 28 2017 1:39 PM UTC

}// 133/140

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saschavoid

remix of d/2585 by u/vvarr

function u(t) {

i=q=c.width=2e3
for(;i--;x.fillRect(o*C(a)*z+q/2,(r*T(b)+190)*z,z*=z/2,z))z=q/((o=2e2+(r=30+C(6*S(a=i/310-t)))*T(b=i%40/8))*S(a+=1.4*t)+710)

Apr 28 2017 11:46 AM UTC

}// 140/140

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All pray to the ondulating cone.

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New_Core

function u(t) {

t==0?a=b=0:c.width|=0;c.onmousemove=e=>(X=e.offsetX,Y=e.offsetY);D=X-a,E=Y-b,Math.sqrt(D*D+E*E)>50?0:(a+=D,b+=E);x.arc(a,b,50,0,7);x.fill()

Apr 28 2017 11:38 AM UTC

}// 139/140

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This works only Fullscreen: you can hook and unhook the ball with your mouse.

u/magna

Hijack S/C instead of X/Y to prevent the initial reference error
u/New_Core

I dont get that Hijack to work.. I made a push ball but it has also reference error before it works so I will not do a remix.. here is code
u/New_Core

t?c.width|=0:a=b=X;c.onmousemove=e=>(X=e.offsetX,Y=e.offsetY);D=X-a,E=Y-b,Math.sqrt(D*D+E*E)<50?(a-=D/9,b-=E/9):0;x.arc(a,b,50,0,7);x.fill()
u/13thptr

#interactive

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saschavoid

remix of d/2606 by u/New_Core

function u(t) {

i=h=c.width|=0;d=~~(h-t%30*60);while(i--)x.fillRect(i,a=700+200*T(t+i/599)*T(t+i/-10),1,h),i==d?b=a:0;

Apr 28 2017 11:33 AM UTC

}// 102/140

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I just find it mesmerazing.

u/donbright

remix https://www.dwitter.net/d/2644

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eruonna

function u(t) {

if(!t)a=578,b=500
d=[262,578,0,0,500,500,"red","#0f0","blue"]
i=~~(Math.random()*3)
a=.5*a+d[i];b=.5*b+d[i+3]
x.fillRect(a,b,1,1)

Apr 27 2017 8:05 PM UTC

}// 129/140

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Wait a while for it to fill in, or view in fullscreen

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@literallylara

function u(t) {

for(t?0:P=[W=960,0],i=99;i--;)Q=[[0,H=1080],[W*2,H],[W,0]][Math.random()*3|0],x.fillRect(P[0]=(P[0]+Q[0])/2,P[1]=(P[1]+Q[1])/2,4,4)

Apr 27 2017 6:23 PM UTC

}// 131/140

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Inspired by https://www.youtube.com/watch?v=kbKtFN71Lfs

u/veubeke

Uncanny

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MrM@_S

function u(t) {

onkeyup=e=>frame=0
t||(c.width=600)
onmousemove=e=>{E=e.pageX,X=e.pageY}
onmousedown=e=>T=!T
T||x.lineTo(E,X)
x.drawImage(c,200,!x.stroke())

Apr 27 2017 5:21 PM UTC

}// 140/140

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[drawing tool] Click to turn off draw. Click again to draw a straight line to your mouse. Press any key to clear. It draws in 3 screens

u/iverjo

#interactive

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joeytwiddle

remix of d/2355 by u/cantelope

function u(t) {

x.save(),x.translate(960,540);for(i=95;i--;x.fillStyle=`hsl(${i*6-t*99},99%,60%`,x.fillRect(a=i*i/9,a,-a*2,-a*2),x.rotate(t/3));x.restore()

Apr 27 2017 4:54 PM UTC

}// 139/140

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Minor remix that shows off the patterns in the spiral, as pointed out by sfz on the original dweet.

u/magna

Wooo!
u/joeytwiddle

Oeps too fast again! t/19 might look smoother for you

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magna

remix of d/2611 by u/magna

function u(t) {

for(i=c.width=w=192;i--;)for(j=w;j--;b=i%8^(X+Y&1^f)*7,'ưưƠƀÃÇÏÏ'.charCodeAt(j&7)-w&1<<b^f<<b&&x.fillRect(i,j,1,1))X=i>>3,Y=j>>3,f=t*X/Y&1

Apr 27 2017 4:38 PM UTC

}// 138/140

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Refactoring to make code more readable (!)

u/magna

#truchet

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rileyjshaw

remix of d/2619 by u/rileyjshaw

function u(t) {

c.width|=0
x.globalCompositeOperation=C(t*=2)<0&&'xor'
for(i=2;i--;x.fill())
x.beginPath(),x.arc(960-S(t)*540*i,540,(2-i)*100,0,7)

Apr 27 2017 3:47 PM UTC

}// 130/140

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Bit of golf…