Sunlight Angle Test

I noticed a discarded glass marble resting near the base of the railing. Sunlight struck its clear sphere, projecting a concentrated, sharp beam of white light onto the coarse concrete. Stepping closer, I positioned my right boot against the sphere to arrest its roll. Beside it lay a flat zinc nut. Using both hands, I balanced the marble precisely atop the hollow hexagonal opening. The glass seated firmly, refracting a fixed hexagonal focal ring against the ground. The alignment is static and stable.