Summarize this article in one sentence.
Establish your main character in the first scene of the script. Open with dialogue that shows the viewer the character. Place the main character in the setting and have them interact or reflect on the setting. Give the viewer a sense of the main character so they can feel immersed in the story.  For example, you may open with a scene where your main character goes to work at their job on Mars, showing their daily routine to introduce them to the reader. Or you may open with dialogue of a fight between the main character and their partner, showing their complicated relationship. The conflict can be something the main character wants, but has a difficult time getting due to obstacles or issues. It can also be a conflict between the main character and another character, where neither character can agree or find common ground. The conflict can also come from an outside factor, such as a bad boss, a mean teacher, or a natural disaster. For example, you may focus on a simple conflict like the main character doesn’t want to go to school that day. You can then come up with what the main character would do instead if they skipped school, focusing on the weird or strange things they might do. Bring the setting to life by including details that make it unique and visually engaging. Make the setting particular by including certain objects in a room. Decide what the climate or weather is in the setting. Include buildings and structures that add to the world of the story. For example, you may set your script in a carnival that caters to aliens. You may then include rides that blast the rider to another galaxy or carnival foods that aliens might enjoy. Dialogue in your script should always be doing two things: exploring character and building conflict. Avoid dialogue like “Hi, how are you?” or “Nice day today.” Write dialogue that cuts to the chase and tells the reader something about the character.  For example, you may give one character a catchphrase that they say whenever they feel stressed or surprised, such as Homer Simpson's famous "D'oh!" You can also have one character with a more casual way of speaking and another character with a more formal way of speaking to create contrast. For example, one character may say, “Sup, alien?” and another character may respond, “Hello there, my illustrious alien friend, how lovely to see you.”

Summary:
Introduce the main character. Include conflict that involves the main character. Keep the setting engaging. Write dialogue that explores character and conflict.