Update app.py

app.py

@@ -51,6 +51,7 @@ h1{text-align:center}
 footer {
     visibility: hidden
 }
+body {background-color: darkgreen;}
 '''
 
 DESCRIPTIONXX = """
@@ -327,7 +328,7 @@ def load_predefined_images1():
     ]
     return predefined_images1
 
-with gr.Blocks(theme=gr.themes.Base()) as demo:
+with gr.Blocks(theme=gr.themes.Base(),css=css) as demo:
     gr.Markdown(DESCRIPTIONXX)
     with gr.Row():
         prompt = gr.Text(