Motion (Words and) Pictures
Screenwriting is often thought of as being all about the spoken word. That's a part of it. But according to screenwriter Khris Baxter, "Scripts are more about visual storytelling. Good dialogue is needed, but the visual aspect is the core."
A script is a blueprint to a movie. When you watch movies, everything you see -- the location, the position of characters, the time of day -- was described in the script.
The best way to learn more about screenwriting is to read scripts. And Khris pointed me to one of the best places to do that. Visit DailyScript at the link below, and you'll find a number of scripts, some in various drafts, some never produced. Whether you're an aspiring screenwriter, a movie buff, or an interested reader, check out this screenplay library.