As vehicles whiz past, a pedestrian meanders on the sidewalk. Above him is a gentle pulsing cerulean light. The glow shifts in hue, from a deep blue, to teal, to an intense purple. It falls gently on a series of protruding waves, jutting out from the cement wall they rest upon. The otherworldly glow now welcomes travelers passing underneath I-5 on Richards Boulevard. The glow, which breathes and moves along a 112 foot long section of molded concrete, is part of the installation piece 'Confluence' by City of Sacramento Senior Architect Gregory B. Taylor. Included in the Richards to Railyards street and sidewalk improvements, the piece bathes the I-5 underpass in blue and purple tones. The