Little ASCII spinner I wrote in rust to learn how to use iterators

spinnyThing.rs

struct SpinnyThing {
	index: usize,
}

impl SpinnyThing {
	const V: [&'static str; 4] = ["/","-", "\\", "|"];
	fn new() -> SpinnyThing {
        SpinnyThing { index: 0 }
    }
}

impl Iterator for SpinnyThing {
	type Item = &'static str;
	fn next (&mut self) -> Option<&'static str>
	{
		self.index = (self.index + 1 ) % SpinnyThing::V.len();
		Some(SpinnyThing::V[self.index])
	}
}

Update: later found out you can do all of this in a single line (thanks to @Winggel) :

"|/-\\".chars().cycle()

but this will be kept up as a example, where all is spelled out explicitly.