diff --git a/src/agent.rs b/src/agent.rs
index 2a00d76..9291316 100644
--- a/src/agent.rs
+++ b/src/agent.rs
@@ -1,7 +1,6 @@
+use crate::{board::Board, piece::Piece};
 use std::collections::VecDeque;
 
-use crate::repr::{Board, Piece};
-
 pub trait Agent {
     fn next_move(&mut self, board: &Board) -> Option<(usize, usize)>;
     fn name(&self) -> &'static str;
diff --git a/src/repr.rs b/src/board.rs
similarity index 92%
rename from src/repr.rs
rename to src/board.rs
index 81e3923..d98443e 100644
--- a/src/repr.rs
+++ b/src/board.rs
@@ -1,36 +1,6 @@
-use crate::misc::split_from;
+use crate::{misc::split_from, piece::Piece};
 use std::fmt;
 
-#[derive(Copy, Clone, PartialEq, Eq, Debug)]
-pub enum Piece {
-    Black,
-    White,
-}
-
-impl Piece {
-    pub const fn flip(&self) -> Self {
-        match self {
-            Piece::Black => Piece::White,
-            Piece::White => Piece::Black,
-        }
-    }
-
-    pub const fn text(&self) -> &'static str {
-        match self {
-            Piece::White => "■",
-            Piece::Black => "□",
-        }
-    }
-}
-
-impl std::ops::Not for Piece {
-    type Output = Piece;
-
-    fn not(self) -> Self::Output {
-        self.flip()
-    }
-}
-
 const BOARD_SIZE: usize = 8;
 
 #[derive(Copy, Clone)]
diff --git a/src/game.rs b/src/game.rs
index a3ab673..f9fee2f 100644
--- a/src/game.rs
+++ b/src/game.rs
@@ -1,4 +1,4 @@
-use crate::{agent::Agent, repr::Board};
+use crate::{agent::Agent, board::Board};
 use std::time::Duration;
 
 pub struct Game {
@@ -43,17 +43,17 @@ impl Game {
 
     // TODO! make this loop good
     pub fn game_loop(&mut self) {
+        let mut i = 0;
         loop {
+            self.step(i);
+
+            // alternate which player plays
+            i += 1;
+            i %= self.players.len();
+
             println!("{}", self);
 
             std::thread::sleep(Duration::from_millis(500));
-            self.step(0);
-            println!("{}", self);
-
-            std::thread::sleep(Duration::from_millis(500));
-
-            self.step(1);
-            println!("{}", self);
         }
     }
 }
diff --git a/src/main.rs b/src/main.rs
index 86ed7e3..b6295b7 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,11 +1,12 @@
 use agent::QueueAgent;
 use game::Game;
-use repr::Piece;
+use piece::Piece;
 
 mod agent;
+mod board;
 mod game;
 mod misc;
-mod repr;
+mod piece;
 
 fn main() {
     let player1 = QueueAgent::new(
diff --git a/src/piece.rs b/src/piece.rs
new file mode 100644
index 0000000..5b50987
--- /dev/null
+++ b/src/piece.rs
@@ -0,0 +1,29 @@
+#[derive(Copy, Clone, PartialEq, Eq, Debug)]
+pub enum Piece {
+    Black,
+    White,
+}
+
+impl Piece {
+    pub const fn flip(&self) -> Self {
+        match self {
+            Piece::Black => Piece::White,
+            Piece::White => Piece::Black,
+        }
+    }
+
+    pub const fn text(&self) -> &'static str {
+        match self {
+            Piece::White => "■",
+            Piece::Black => "□",
+        }
+    }
+}
+
+impl std::ops::Not for Piece {
+    type Output = Piece;
+
+    fn not(self) -> Self::Output {
+        self.flip()
+    }
+}