diff --git a/src/card.rs b/src/card.rs
new file mode 100644
index 0000000..e69de29
diff --git a/src/deck.rs b/src/deck.rs
new file mode 100644
index 0000000..e69de29
diff --git a/src/gamestate.rs b/src/gamestate.rs
new file mode 100644
index 0000000..e69de29
diff --git a/src/hand.rs b/src/hand.rs
new file mode 100644
index 0000000..e69de29
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..d187db1
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,12 @@
+use std::error::Error;
+
+mod card;
+mod hand;
+mod deck;
+mod gamestate;
+
+pub fn run() -> Result<(), Box<dyn Error>> {
+    println!("Hello, world!");
+
+    Ok(())
+}
diff --git a/src/main.rs b/src/main.rs
index e7a11a9..b2ffc8e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,8 @@
-fn main() {
-    println!("Hello, world!");
+use blackjack::run;
+use std::error::Error;
+
+fn main() -> Result<(), Box<dyn Error>> {
+    run()?;
+
+    Ok(())
 }