foreign func putchar(c: i32) -> i32

func print(c: u8):
	putchar(c as i32)

func mandelbrot():
	let width = 120
	let height = 40
	mut y = 0
	while y < height:
		mut x = 0
		while x < width:
			let cx = (x as f32 + 0.5) / (width as f32) * 2.5 - 2.0
			let cy = (y as f32 + 0.5) / (height as f32) * 2.0 - 1.0
			mut tx = 0.0
			mut ty = 0.0
			mut i = 0
			while i < 100 && (tx * tx + ty * ty < 4.0):
				let newx = tx * tx - ty * ty + cx
				ty = 2.0 * tx * ty + cy
				tx = newx
				i = i + 1
			if i == 100:
				print('X')
			else:
				print(' ')
			
			x = x + 1
		y = y + 1
		print('\n')