Occurred during early evening hours. Large UFO, witnessed by many in neighborhood, hovered over open field at end of housing project. Loud, hummimg sound emitted, no other noise, no white lights but, edge of craft encircled by blue, turning to green to red lights.
No one in crowd felt threatened, no panic just in awe, everyone almost frozen. It was directly over our heads in a wide open farm field.
Do not remember how long it was there, I ran home to tell my parents. I was 7 years old at the time. Did not see craft appear or disappear, it was so fast.