add examples

app.py

@@ -44,10 +44,11 @@ iface = gr.Interface(fn=test,
                       title= "GPT2 Model",
                       description = description,
                       inputs=[
-                              gr.inputs.Textbox(lines=4, value=default_prompt, label='Prompt')
+                              gr.inputs.Textbox(lines=4, placeholder="Prompt", label='Prompt')
                               ],
                       outputs=[
                                gr.outputs.Textbox(label="Tu poema"),
-                              ]
+                              ],
+                      examples= [default_prompt]
                      )
 iface.launch(enable_queue=True)