added default values

app.py

@@ -46,8 +46,8 @@ with gr.Blocks() as demo:
     See live download stats for all of Hugging Face's open-source libraries 🤗 along with a 3 month forecast using Prophet
     """)
     with gr.Row():
-        lib = gr.Dropdown(["transformers", "datasets", "huggingface-hub", "gradio"], label="Library")
-        time = gr.Dropdown(["3 months", "6 months", "9 months", "12 months"], label="Downloads over the last...")
+        lib = gr.Dropdown(["transformers", "datasets", "huggingface-hub", "gradio"], value="transformers", label="Library")
+        time = gr.Dropdown(["3 months", "6 months", "9 months", "12 months"], value="12 months", label="Downloads over the last...")
 
     plt = gr.Plot()