Dweets awesomed by u/Catman

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: #Opposites

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iverjo

function u(t) {

x.fillRect(i=0,87,W=c.width=310,3);x.font='49px A';for(a of'🚂🚃🚃🚃🚃🚃🚃')x.fillText(a,q=W-t%4*W+i++*46,90+S(q/15))

Jul 24 2016 2:14 AM UTC

}// 110/140

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It turns out that this looks different with the Windows 10 Anniversary update

u/iverjo

#train

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elrod

function u(t) {

c.width=120;for(j=5;j--;)for(i=5;i--;)x.fillRect(i*25,j*7,20,5);x.fillRect(47+15*S(t*8),60,25,5);x.arc(60,12*S(t*6)+47,2,0,6);x.fill()

Jul 22 2016 12:25 PM UTC

}// 134/140

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elrod

function u(t) {

c.width=120;j=0;while(j<5){i=0;while(i<5){x.fillRect(i*25,j*7,20,5);i++}j++};x.fillRect(47,60,25,5);x.arc(60,12*S(t*6)+47,2,0,6);x.fill();

Jul 22 2016 9:53 AM UTC

}// 138/140

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mmerchante

function u(t) {

W=A=B=c.width=3e2;x.fillRect(0,0,B,B);while(--W){A=B*A>>8;k=A%4;x.fillStyle=R(0,B/k);x.fillText(String.fromCharCode(t+B*W),W,(A+t*B/k)%B);}

Jul 22 2016 3:26 AM UTC

}// 139/140

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u/iverjo

#matrix

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sigveseb

remix of d/312 by u/iverjo

function u(t) {

i=W=c.width=256;x.lineWidth=3;x.moveTo(X=W*t%W,V=60);x.arc(X,V,40,G=S(t*9)/3+.3,6.3-G);x.lineTo(X,V);x.fillStyle='#ff0';x.fill();x.stroke()

Jul 22 2016 2:32 AM UTC

}// 139/140

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#pacman

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iverjo

function u(t) {

for(i=6e3;i--;)s=149/(i+200),p=i/97+t*2,c=S(p)*199+T(p)*19,x.fillStyle=R(c,y=99+c,y,.1),x.fillRect(2e3*(T(i/9)+s*t)%2e3,3e3*s-74,q=99*s,q)

Jul 21 2016 3:38 PM UTC

}// 138/140

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Go fullscreen and imagine that you are in a boat travelling to the left. Imagine that you are looking through a wet window, and notice the raindrops that are sliding down the window.

u/PhiLho

Nice! Actually, I see more Peter Gabriel's first solo album cover: http://www.soundstation.dk/images/products/l…
u/iverjo

#water

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iverjo

function u(t) {

for(i=4e3;i--;)c=155+99*S(t+4*S(i*9)),x.fillStyle=R(99+c,c),s=45/(9-(t+i/100)%9+1),x.fillRect(960+25*s*C(i),540+25*s*S(i),s,s)

Jul 21 2016 2:56 PM UTC

}// 126/140

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Solar beams

u/iverjo

#sun

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3bl3gamer

function u(t) {

c.width=192;for(i=63;k=Math.abs(S(t*4)),a=i*.1+t,i--;)x.fillRect(96+C(a)*25,79+S(a)*25*(k<.2?k*2+.5:1)-k*50,1,1),x.fillText(7,i*4-t*70%9,99)

Jul 20 2016 9:19 AM UTC

}// 140/140

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u/sigveseb

nice
u/joeytwiddle

#bounce

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