I was walking east on e. independence st, towards n. shamokin st, shortly after dark with groceries. as i reached the intersection of e. independence st. and n. shamokin st., i started turning right to walk south on n. shamokin st. as i turned, i noticed a very low flying object over the buildings across the street on n shamokin st. it was flying south, and seemingly randomly pulsated white, green, and red. the object flew at a constant speed. it appeared around 50-100 feet above the buildings. it was so low that i quickly lost sight of the object behind the buildings. the sighting was so short that i was unable to video it on my phone in time. date/time approximate.