pub struct RotatingList<T>(usize, Vec<T>);

impl<T> RotatingList<T>
{
    pub fn new() -> Self {
	Self(0, Vec::new())
    }

    pub fn push(&mut self, value: T)
    {
	self.1.push(value);
    }

    pub fn get(&mut self) -> &mut T
    {
	if self.0 >= self.1.len() {
	    self.0 = 0;
	}
	self.0 += 1;

	&mut self.1[self.0-1]
    }

    pub fn iter(&mut self) -> &mut Vec<T> {
	&mut self.1
    }
}