update app download function

app.py

@@ -1,10 +1,13 @@
 from ASCII_functions import generate_ascii_art
 import gradio as gr
+import tempfile
 
 def save_ascii_art(ascii_art):
-    with open("ascii_art.txt", "w") as file:
-        file.write(ascii_art)
-    return "ASCII art saved to ascii_art.txt"
+    # Create a temporary file to save the ASCII art
+    with tempfile.NamedTemporaryFile(delete=False, suffix=".txt") as tmp_file:
+        tmp_file.write(ascii_art.encode('utf-8'))
+        tmp_file_path = tmp_file.name
+    return tmp_file_path
 
 css = """
 #ascii_art_box textarea {
@@ -28,9 +31,10 @@ with gr.Blocks(css=css) as demo:
         ascii_art = gr.Textbox(label="ASCII Art", placeholder=None, interactive=True, lines=50, scale=2, elem_id="ascii_art_box")
     with gr.Row():
         save_button = gr.Button("Save ASCII Art")
+        download_link = gr.File(label="Download ASCII Art")
 
     generate_button.click(fn=generate_ascii_art, inputs=[input_image], outputs=ascii_art)
-    save_button.click(fn=save_ascii_art, inputs=ascii_art, outputs=gr.Textbox(label="Save Status"))
+    save_button.click(fn=save_ascii_art, inputs=ascii_art, outputs=download_link)
 
     # Adding examples
     gr.Examples(examples=examples, inputs=input_image)