main.rs

fn main()
{
	let v = (0..16).collect::<Vec<_>>();

	for p in v.iter()
		.chain(v.iter().rev().skip(1).take(v.len()-2))
		.cycle()
		.take(35)
	{
		for i in (v.len()/2..).take(v.len()+v.len()/2)
		{
			print!("{}",if (i%(v.len()/2))==(p%(v.len()/2)){'#'} else{' '});
		}
		println!("");
	}
}