Writing a scene means focusing on the details of that particular moment you’re trying to create. You must try and invoke all the senses in the reader’s imagination, so that the reader can imagine the place, the characters, and their actions.
It might sound obvious, but it takes years to become really good at this. Here’s an example of a painting masterpiece by French painter Alexandre Cabanel. I am including a close up of his painting,  Fallen Angel, so that you can see how he perfected a certain detail. The result gives me chills!
Fallen Angel - detailFallen Angel