Update app.py

app.py

@@ -124,7 +124,7 @@ def make_animation():
                 frame_one.save(filename, format="GIF", append_images=frames,
                            save_all=True, duration=100, loop=0)
                 html_out+=f'<div class="img_class"><img src="{filename}"></div>'
-
+    html_out+='</div>'
     return html_out
 
 def run():