How do you draw a light cone of an event?

To draw a light cone of an event in spacetime, start by marking the event's position on a graph with time on the vertical axis and space on the horizontal axis. From this event, draw two lines at 45-degree angles (in units where the speed of light is normalized to 1) extending outward in both the positive and negative time directions. These lines represent the paths that light could take from the event, forming the "cone." The region inside the cone encompasses all the events that can be causally influenced by or can influence the original event.