const MAX_ITERATION = 80
function mandelbrot(c) {
let z = { x: 0, y: 0 }, n = 0, p, d;
do {
p = {
x: Math.pow(z.x, 2) - Math.pow(z.y, 2),
y: 2 * z.x * z.y
}
z = {
x: p.x + c.x,
y: p.y + c.y
}
d = Math.sqrt(Math.pow(z.x, 2) + Math.pow(z.y, 2))
n += 1
} while (d <= 2 && n < MAX_ITERATION)
return [n, d <= 2]
}