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

iter(d, flip=0) = {
	if (flip,
		L=-L;
	);

	if (d,
			d--;
			iter(d);
			left();
			iter(d, 1);
			right();
			iter(d);
			right();
			iter(d, 1);
			left();
			iter(d),

			move()
	);

	if (flip,
		L=-L;
	);
}

print (0 " " real(z))
iter(5)

quit