Each dot is one place
The globe samples a latitude and longitude grid. At each point, the browser computes local prayer times from the sun for the selected date and method.
Live prayer-time model
Prayer times follow the sun. As one place leaves a prayer window, another place enters one. The question is whether that chain ever drops to zero.
The line compresses the full day. Color follows the prayer with the most active sampled places in that moment. Dark gaps would show silent minutes.
Building the day strip.
The globe samples a latitude and longitude grid. At each point, the browser computes local prayer times from the sun for the selected date and method.
A dot lights up when the selected time falls inside that point's prayer window. As time moves, the colored band travels west with the sun.
The full-day line uses the same prayer colors as the dots. Each part takes the prayer window with the most active sampled places at that time. Dark still means no sampled place is active.
Grid dots are geometric samples, including oceans. This is a browser model, not an official timetable.