Early morning run, round the Central Park Reservoir. steady pace, varied steps, slow and fast, singles and groupies. Soft thuds on gravelly surface, legs fly, toes touch, heels plant in dissonant melody as color-coordinated shoe and running shorts - green, pink, blue, black - whiz by. They run ragged past the walkers who then pick up their pace. Easy to sit in one spot and shoot as runners fly.