Arduino & Nextion HMI help

Hi I’m new to Arduino, I bought a slate training kit and nextion 2.4 inch HMI 4MB. I am looking at a few examples of the projects that I couldn’t connect with the RX TX with the screen Arduino, looking at them, I liked the nextion screen, I am looking for a friend who can give me a sample project with Arundino UNO and nextion 2.4. LED lamp with a button on the screen, running Arduino LED lamp, LED lamp on the screen when the nextion can not see the information that worked