n = 0
z = 0
dz = 1
move() = {
	z+=dz;
	print (n++ " " imag(z));
}
left()  = dz *= I
right() = dz /= I

iter(d) = {
	if (d,
			d--;
			iter(d);
			left();
			iter(d);
			right();
			move();
			right();
			iter(d);
			left();
			iter(d),

			move()
	);
}

print (0 " " imag(z))
iter(6)

quit