When the morning sun breaches the high-walled campus of Burro Hall Enterprises World HQ, the light streams onto the top of stairway landing. On a good day, the perro will haul himself up the dozen steps to greet it. But at age 14-and-a-half, that's a pretty long slog for a shot of Vitamin D. Fortunately, a few minutes later, the sunbeam hits a tiny wedge in the western corner of the courtyard wall, and over the next hour and a half, as the world turns on its axis, it slithers down the wall until it lands on a tiny patch of ground in the corner. It takes a few minutes for the stones to warm up. The perro stands by, patiently. And then he takes up his position.
It takes about seven hours for the light to move across the campus and up the eastern wall.