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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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katkip

remix of d/13409 by u/katkip

function u(t) {

x.translate(960,440);x.font='4cm"';x.fillText(".",0,0)
x.rotate(Math.PI*2/3)
x.drawImage(c,0,650,960,1337)

Apr 23 2019 2:28 PM UTC

}// 106/140

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#fractal

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taupelink

remix of d/22842 by u/taupelink

function u(t) {

for(i=q=200;--i;x.fillRect(q*X,q*Y,-3*q*.6**t,-2*i*.7**t))f=97*i*t,X=f*f%99,Y=X*f%55,x.fillStyle=R(q%=i,q+=S(q/X)*i,q+=S(q%Y)*i,q/i/t)

May 24 2021 10:19 PM UTC

}// 134/140

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d/22857

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ArthurThuczsec

remix of d/23528 by u/rodrigo.siqueira

function u(t) {

for(d=new ImageData(c.width=w=256,m=w*w),i=3;m--;d.data[i+=4]=i&i*Y)Y=m%w&w+(m-t*19e12)/w&t*t;x.putImageData(d,0,0)

Aug 10 2021 7:24 PM UTC

}// 115/140

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#sierpinski attack noise

u/cantelope

no moar sierpinski plox
u/ArthurThuczsec

"in less than 60 seconds you will see the most momentous explosion ever witnessed by human eyes!"

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whitecube-void

function u(t) {

o=400;y=t*(t*o)/6;z=t*o;x.fillStyle=R(t*30+80,t*10+80,t*100+80,1);x.font=o+'px s';x.clearRect(z+20,y-250,250,o);x.fillText('🂡',z,y,300)

Jul 25 2018 8:47 AM UTC

}// 135/140

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zadgy5534

remix of d/32606 by u/zadgy5534

function u(t) {

c.width|=0
for(x.reset(i=w=2e3);i--;)
x.fillStyle=R(i%w,i/w,i*w/t),
x.fillRect(i*C(t/i)^S(i+t)*49,540+i*S(t/i)*C(i-t)*19,19,9)

Oct 28 2024 2:01 PM UTC

}// 127/140

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Ups and Downs

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quuxman

function u(t) {

P=q=>(S((t|0)*q*99)+1)*1e3%2e3
for(j=20;j--;x.fillStyle=R(P(j),P(j+1),0))for(i=15;i--;)x.fillRect(S(i)*(r=(t%1)*400)+P(j),C(i)*r+P(j+1),4,4)

Jan 1 2018 11:02 AM UTC

}// 140/140

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2017++ and the fireworks burst through the crucible of byte reduction

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icecuber

function u(t) {

t?i++:i=0;for(j=1080;j--;){a=b=0;k=35;for(;k--&&a*a+b*b<4;)c=a*a-b*b+i/540-2,b=2*a*b+j/540-1,a=c;x.fillRect(i,j,1,S(k/9))}

Apr 13 2016 1:46 PM UTC

}// 122/140

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u/iverjo

115 bytes: for(j=1080;j--;a=b=0){for(k=35;k--&&a*a+b*b<4;a=y)y=a*a-b*b+t*60/540-2,b=2*a*b+j/540-1;x.fillRect(t*60,j,1,S(k/9))}
u/iverjo

Here's one that draws faster: for(i=4;i--;){for(j=1080;j--;a=b=0){for(k=35;k--&&a*a+b*b<4;a=y,l=t*240+i)y=a*a-b*b+l/540-2,b=2*a*b+j/540-1;x.fillRect(l,j,1,S(k/9))}}
u/iverjo

Nvm, they depend on various variables being defined. I was fooled.
u/myJS

How about colors? t?i++:i=0;for(j=1080;j--;){a=b=0;k=35;for(;k--&&a*a+b*b<4;)c=a*a-b*b+i/540-2,b=2*a*b+j/540-1,a=c;x.fillStyle=R(k,j,i);x.fillRect(i,j,1,S(k/9))}
u/sfz

Nice enhancement myJS!
u/lionleaf

#scanline #slow_render #fractal #fractals

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BriSeven

remix of d/18155 by u/BriSeven

function u(t) {

c.width*=1
for(i=64;i--;)x.setTransform(C(t)*2,S(t),-S(t)*2,C(t),950,90+i*5),x.fillStyle=R(i*5),x.fillRect(d=C(i/20)*30,0,-d+30,d+40)

Apr 6 2020 4:50 AM UTC

}// 133/140

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A 'spritestack' but it's rectangles.

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grg

function u(t) {

May 20 2024 6:28 PM UTC

}// 0/140

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c.width|=0;for(i=0;i<9;i++)for(j=0;j<9;j++)x.fillRect(9*i*5,9*j*5,9,9),x.strokeRect(9*i*5,9*j*5,9,9)

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jellyedwards

function u(t) {

x.fillRect(960+S(t/=2)*400+R*t,580+C(t)*400+Math.abs(R=T(t)),9*R,9*S(t)/R)

Feb 1 2021 11:04 PM UTC

}// 74/140

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Poor man's raytraced sphere