Each dot represents a person, color represents the activity, and time of day is shown in the top left. As someone changes an activity, say from sleep to a morning commute, the dot moves accordingly.
Following the timeline of the ATUS, the simulation starts at 4:00am and runs through 24 hours. The day starts with little movement as people are asleep and won’t wake up for a few hours. For most, the day starts at 7:00am and then it’s off to the races (which is especially fun to see on the fast speed).
You see people head to work, run errands, do housework, take care of the kids, commute, relax, and eat at almost designated times during the day. I stared at these dots longer than I care to admit.
Although with all 1,000 dots floating around it can be a challenge to keep track of where all those people went.