Update app.py

app.py

@@ -303,7 +303,7 @@ with gradio.Blocks() as demo:
             th1 = gradio.Dropdown(thickness_options, label="Thickness 1", value=random.choice(thickness_options))
         with gradio.Column():
             t2 = gradio.Dropdown(endpoint_types, label="Type 2", value=random.choice(endpoint_types))
-            d2 = gradio.Dropdown(density_options, label="Density 2", random.choice(density_options))
+            d2 = gradio.Dropdown(density_options, label="Density 2", value=random.choice(density_options))
             th2 = gradio.Dropdown(thickness_options, label="Thickness 2", value=random.choice(thickness_options))
     steps = gradio.Dropdown(interpolation_options, label="Interpolation Length", value=random.choice(interpolation_options))
     btn = gradio.Button("Run")