add groups , interface, howto images

app.py

@@ -173,7 +173,7 @@ with gr.Blocks(theme=gr.themes.Base()) as demo:
                     with gr.Group():                    
                         gr.Markdown(howto)
             with gr.Row():
-                for i in range(5):
+                for i in range(4):
                     with gr.Column():
                         gr.Image(f"res/image/howto_{i+1}.png", label=f"How To Step {i+1}")