let width = 40.0;

let height = 20.0;

let zoom = 0.7;

let movex = -0.5;

let movey = 0.0;

let max_iters = 15;

let shades = ['.', '$', '%'];

let newre = 0.0;

let oldre = 0.0;

let newim = 0.0;

let oldim = 0.0;

func mandle(x, y) {

let z = 0.0;

newre = 0.0;

newim = 0.0;

let pr = 1.5*(x - width/2.0)/(0.5*zoom*width)+movex;

let pi = (y - height/2.0)/(0.5*zoom*height)+movey;

let n = 0;

let checkn = 0.0;

while n < max_iters {

oldre = newre;

oldim = newim;

newre = oldre*oldre-oldim*oldim+pr;

newim = 2.0*oldre*oldim+pi;

checkn = newre*newre+newim*newim;

if (checkn > 4.0) {

io.write(shades[(n % 3)]);

return 0;

}

n += 1;

}

io.write(' ');

}

func calc_line() {

let x = 0.0;

let y = 0.0;

while y < height {

while x < width {

mandle(x, y);

x += 1.0;

}

io.write('\n');

x = 0.0;

y += 1.0;

}

}

calc_line();