going public

src/animator.rs

 
 use crate::components::*;
 
-struct Animator;
+pub struct Animator;
 
 impl<'a> System<'a> for Animator {
     type SystemData = (

src/main.rs

 mod components;
 mod physics;
 mod animator;
+mod keyboard;
 
 use sdl2::pixels::Color;
 use sdl2::event::Event;

src/physics.rs

 
 use crate::components::*;
 
-struct Physics;
+pub struct Physics;
 
 impl<'a> System<'a> for Physics {
     type SystemData = (WriteStorage<'a, Position>, ReadStorage<'a, Velocity>);