diff --git a/src/main.rs b/src/main.rs
index 8e7d962..6d69ebf 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -4,22 +4,23 @@ use serde_json::Value;
 fn main() -> std::io::Result<()> {
     let json_string = fs::read_to_string("boards/coding.json")?;
     let output_dir = "output";
-    fs::create_dir(output_dir);
+    fs::create_dir(&output_dir)?;
 
     let json_data: Value  = serde_json::from_str(&json_string).unwrap();
 
-
-    let board_dir = output_dir.to_owned() + "/" + json_data["name"].as_str().unwrap();
-    fs::create_dir(&board_dir).expect("unable to create dir");
+    let board_dir = format!("{}/{}", &output_dir, &json_data["name"]);
+    fs::create_dir(&board_dir)?;
 
     if let Value::Array(lists) = &json_data["lists"]{
         if let Value::Array(cards) = &json_data["cards"]{
             for list in lists {
-                fs::create_dir(board_dir.clone() + "/" + list["name"].as_str().unwrap())?;
+                let list_dir = format!("{}/{}", &board_dir, list["name"]);
+                fs::create_dir(&list_dir)?;
                 for card in cards {
                     if card["idList"] == list["id"]{
                         println!("{}: {}", list["name"], card["name"]);
-                        let mut file = fs::File::create(board_dir.clone() + "/" + list["name"].as_str().unwrap() + "/" + card["name"].as_str().unwrap() + ".md");
+                        let file_path = format!("{}/{}/{}.md", &board_dir, &list_dir, &card["name"]);
+                        let mut _file = fs::File::create(&file_path);
                         //file.write_all(b"#" + card["name"].as_str().unwrap());
                     }
                 }