diff --git a/Project-02/Source.gv.png b/Project-02/Source.gv.png
index 1154714..a69a7d1 100644
Binary files a/Project-02/Source.gv.png and b/Project-02/Source.gv.png differ
diff --git a/Project-02/main.py b/Project-02/main.py
index ab17e50..53ae503 100644
--- a/Project-02/main.py
+++ b/Project-02/main.py
@@ -47,7 +47,14 @@ def pretty_print(node, indent=0):
         else:
             print(f"{prefix}  {key}: {value}")
 
-def prompt_choice(prompt: str, options: list) -> int:
+def export_dot_file(dot_string: str, filename: str):
+    try:
+        Path(filename).write_text(dot_string, encoding="utf-8")
+        print(f"Saved DOT file as: {filename}")
+    except Exception as e:
+        print(f"Could not save DOT file: {e}")
+
+def __prompt_choice(prompt: str, options: list) -> int:
     print(prompt)
     for i, opt in enumerate(options, 1):
         print(f"  {i}. {opt}")
@@ -62,13 +69,13 @@ def prompt_choice(prompt: str, options: list) -> int:
             pass
         print(f"Invalid. Enter a number between 1-{len(options)}.")
 
-def prompt_yesno(question: str, default="y"):
+def __prompt_yesno(question: str, default="y"):
     s = input(f"{question} (y/n) [{default}]: ").strip().lower()
     if not s:
         s = default
     return s.startswith("y")
 
-def search_programs():
+def __search_programs():
     base = Path(__file__).parent / "triplaprograms"
     if not base.exists():
         return []
@@ -78,42 +85,38 @@ if __name__ == "__main__":
     print("\nTRIPLA Parser Tool")
 
     while True:
-        choice = prompt_choice("\nSelect action:", ["Parse .tripla", "Exit"])
+        choice = __prompt_choice("\nSelect action:", ["Parse .tripla", "Exit"])
 
         if choice == 1:
             print("\nBye Bye.")
             break
 
-        programs = search_programs()
+        programs = __search_programs()
         if not programs:
             print("\nNo .tripla files found.")
             continue
 
-        idx = prompt_choice("\nSelect program to parse:", [p.name for p in programs])
+        idx = __prompt_choice("\nSelect program to parse:", [p.name for p in programs])
         path = programs[idx]
 
         source = path.read_text()
         ast = yacc.parser.parse(source)
 
         # Pretty print
-        if prompt_yesno("\nPretty-print AST?"):
+        if __prompt_yesno("\nPretty-print AST?"):
             print("")
             pretty_print(ast)
 
         # Export DOT
         dot_str = ast.to_dot()
-        if prompt_yesno("Export AST as .dot file?"):
+        if __prompt_yesno("Export AST as .dot file?"):
             default = f"{path.stem}.dot"
             out = input(f"Filename [{default}]: ").strip()
             if not out:
                 out = default
-            try:
-                Path(out).write_text(dot_str, encoding="utf-8")
-                print(f"Saved DOT file as: {out}")
-            except Exception as e:
-                print(f"Could not save DOT file: {e}")
+            export_dot_file(dot_str, out)
 
         # Display AST diagram
-        if prompt_yesno("Display AST diagram?"):
+        if __prompt_yesno("Display AST diagram?"):
             render_ast_from_string(dot_str)
             print("Rendered AST diagram.")