show updating leaderboard notification

app.py

@@ -198,6 +198,12 @@ def reload_all_data():
     for rl_env in RL_ENVS:
         RL_DETAILS[rl_env]['data'] = update_data_per_env(rl_env)
 
+    html = """<div style="color: green">
+                <p> ✅ Leaderboard updated! Click `Reload Leaderboard` to see the current leaderboard.</p>
+                </div>
+               """    
+    return html            
+
 
 def reload_leaderboard(rl_env):
     global RL_DETAILS
@@ -221,7 +227,11 @@ RL_DETAILS ={'CarRacing-v0':{'title':" The Car Racing 🏎️ Leaderboard 🚀",
 
 block = gr.Blocks(css=BLOCK_CSS)
 with block:
-    block.load(reload_all_data,[],[])
+    notification = gr.HTML("""<div style="color: green">
+                <p> ⌛ Updating leaderboard... </p>
+                </div>
+               """)
+    block.load(reload_all_data,[],[notification])
     
     with gr.Tabs():
         for rl_env in RL_ENVS: