diff --git a/README.md b/README.md
index 04bf7a7..d2b68a1 100644
--- a/README.md
+++ b/README.md
@@ -11,3 +11,9 @@ MIX_ENV=prod mix release
 ```
 
 The built binary will be in `_build/prod/rel/bakeware/find_old_mp3s`
+
+## Usage
+
+```shell
+_build/prod/rel/bakeware/find_old_mp3s "~/**/*.{mp3}"
+```
diff --git a/lib/find_old_mp3s.ex b/lib/find_old_mp3s.ex
index 09aff15..ddd8bca 100644
--- a/lib/find_old_mp3s.ex
+++ b/lib/find_old_mp3s.ex
@@ -2,8 +2,12 @@ defmodule FindOldMp3s.Main do
   use Bakeware.Script
 
   @impl Bakeware.Script
-  def main(_args) do
-    IO.puts "Hello, World!"
+  def main(args) do
+    path = args
+      |> Path.expand
+
+    Path.wildcard(path) |> Enum.each(fn path -> IO.puts(path) end)
+
     0
   end
 end