JSFiddle - React, Tailwind, and code Playground

CoffeeScript

document.body.appendChild V=document.createElement 'Canvas'
N=99
Z=V.width=V.height=400
P=[]
P.push "rgba(0,0,0,"+Math.random()*i/N+')' for i in [N..0]
X=V.getContext '2d'
for x in [0..Z]
 for y in [0..Z]
  k=a=b=0
  [a,b]=[a*a-b*b+4*x/Z-3,2*a*b+4*y/Z-2] while a*a+b*b<4 and N>k++
  X.fillStyle=P[k-1]
  X.fillRect x,y,1,1