Update app.py

app.py

@@ -179,7 +179,13 @@ with gr.Blocks(css=CSS, title="Helios Video Generation", theme=gr.themes.Soft())
             prompt = gr.Textbox(
                 label="Prompt",
                 lines=4,
-                value="A vibrant tropical fish swimming gracefully...",
+                value=(
+                    "A dynamic time-lapse video showing the rapidly moving scenery "
+                    "from the window of a speeding train. The camera captures various "
+                    "elements such as lush green fields, towering trees, quaint "
+                    "countryside houses, and distant mountain ranges passing by quickly. "
+                    "Medium shot focusing on the train window and the rushing scenery beyond."
+                )
             )
             with gr.Accordion("Advanced Settings", open=False):
                 with gr.Row():