diff --git a/src/main.rs b/src/main.rs
index e7a11a9..e06c7af 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,8 @@
 fn main() {
-    println!("Hello, world!");
+    
 }
+
+pub enum List {
+    Empty,
+    Elem(i32, List),
+}
\ No newline at end of file