I’ve tried this idea some time back and was not happy with the result.
The best time of year is May to August, when the afternoon sun comes into the house at the right angle through a hollow fancy brick section. A loose leaved tree with the wind’s help decides, when the sun can shine through which openings. A slightly hazy sky would give softer light patches, I guess.
To get the rough bricks show up best, I placed a dimmed flood light close to the wall, shining from the bottom up. Anticipating the light patches was a challenge. Next time I might try some continuous shooting, but what’s the challenge?
I do have enough minute to minute shots which I would project in a quarter-second rhythm to move the hands smoothly. I’m a clockmaker, by the way.
Hope, you like it. Thomas