app.py

import gradio as gr
import os

def greet(name, intensity):
    return "Hello, " + name + "!" * int(intensity)

css = ".gradio-container {background: url(https://upload.wikimedia.org/wikipedia/commons/thumb/c/cc/The_One_Ring_by_Yukatan.svg/640px-The_One_Ring_by_Yukatan.svg.png)}"
my_theme = gr.Theme.from_hub("gradio/seafoam")
demo = gr.Interface(
    fn=greet,
    inputs=["text", "slider"],
    outputs=["text"],
#    theme=my_theme,
    css = css
)

demo.launch()