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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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taupelink

remix of d/19890 by u/taupelink

function u(t) {

r=Math.random;for(i=1e3;i--;x.fillRect(960+k*X*C(Y),k*X*S(Y),k/t,k/t))X=r(Y=r(k=50)*4)*k,x.fillStyle=R(h=220*C(X**3/1e3/S(Y)),h/.9,k+h*.9)

Sep 10 2020 5:54 AM UTC

}// 138/140

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d/19903

u/magna

Wooow!
u/magna

(Looks very 3D)

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Axioplase

function u(t) {

c.width=2e3
for(i=4e3;i--;)
a=700+320*(1+C(i)),
b=300+320*(1+S(i)*C(i/(1+t/1e4))),
x.fillRect(a,b,2*(2+C(t)),2*(2+S(t)))

Oct 29 2026 8:18 PM UTC

}// 120/140

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Sphere

u/Axioplase

If you replace S(i) with S(i+t) you get a 3D rotation as well that brings interesting results.

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katkip

remix of d/11756 by u/katkip

function u(t) {

c.width*=1;t||(V=0,B=0,n=960,m=540);c.onmousemove=e=>{X=e.x*1.4,Y=e.y*1.4};n<X?V++:V--;m<Y?B++:B--;n+=V;m+=B;x.arc(n,m,30,30,0,7),x.fill()

Jan 12 2019 11:33 AM UTC

}// 138/140

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u/Undefined

ReferenceError
u/katkip

^ yes. move your mouse
u/13thptr

gr8 inertia

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Xen

function u(t) {

x.fillStyle=`hsl(${z=t*2e3} 50%50%)`
x.fillRect(z%2e3,z/1e3*4,39,5)

Sep 6 2020 5:20 PM UTC

}// 67/140

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jonathan-potter

remix of d/11257 by u/yonatan

function u(t) {

r=Math.random;for(u[h=16]=r(i=9e3)*i;i--;x.fillRect(i/2,i%32*h,h,h))x.fillStyle=R(n=u[i]=r(q=i+r()-.3|0)*(u[q]+u[q-32]+u[q-31])/1.5|0,n/2)

Dec 4 2018 1:18 AM UTC

}// 138/140

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#fire changed some things stylistically to fit

u/iverjo

Very nice!
u/Qwitter

Cool NES Vibes! Awesome!

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danny@hille.dk

remix of d/18518 by u/ntsutae

function u(t) {

for(x.fillRect(0,x.globalAlpha=.1,w=i=1920,w);i--;x.clearRect(y,S(i*i-t)*333+540,9,9))y=(t*333-i)%w

Jan 21 2021 8:22 PM UTC

}// 99/140

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golf and play

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rodrigo.siqueira

remix of d/35577 by u/rodrigo.siqueira

function u(t) {

for(X=Y=i=3e4;i--;x.fillRect(Y*210+960,X*230+410,t<1,.1))u=X%3-.2,r=(u*u+Y*Y)**.5,s=T(i*i/t)<1||-1,X=s*(r+u)/3+S(X),Y=s*(r-u)**.6*(Y<0||-1)

Jun 11 2026 3:11 PM UTC

}// 139/140

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Bioform: bug with 12 legs

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aaaaaz

function u(t) {

for(i=0;i<9;i++)x.fillRect(770+i*100+S(t*i*0.15)*300,880,50,200);x.drawImage(c,-9,-9);x.filter=`invert(100)`

May 18 2019 4:34 PM UTC

}// 108/140

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u/rodrigo.siqueira

#default bars

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f8f82804

remix of d/10658 by u/f8f82804

function u(t) {

for(c.width|=i=13;i--;x.lineTo(967+(y-1?0:1e3*S(p)/z),1e3*y/z))y='011112101211'[i],z=y-1?3:3+C(p=t+1.57*'012340302014'[i]);x.fill('evenodd')

Oct 25 2018 5:41 PM UTC

}// 140/140

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#d3 #perspective #octahedron

u/pavel

Here is 12 characters saved: c.width^=i=0;for(y of'111121012110')x.lineTo(960+y%2*S(p=t+1.6*'123403020140'[i++])*(z=1600/(3+y%2*C(p))),y*z);x.fill('evenodd')
u/f8f82804

using 1.6 to approximate Math.PI/2 is OK, but you should change all the 4s to 0s in the second data string, just to minimze the aggregate angular error. I used 4 for clarity, because 1.57 is accurate enough that the error is hard to notice. With 1.6 you can notice that one edge is longer than the others. c.width^=i=0;for(y of'111121012110')x.lineTo(960+y%2*S(p=t+1.6*'123003020100'[i++])*(z=1600/(3+y%2*C(p))),y*z);x.fill('evenodd')

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brianholley

function u(t) {

c.width^=0;x.translate(0,540);for(i=0;i<30;i++)x.fillStyle=`hsl(${30*t},${20+3*i}%,60%)`,x.fillRect(i*80,200*S((i+15)*t/2),60,12)

Mar 12 2017 4:19 AM UTC

}// 131/140

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