Noticed on intersection at hannafords grocery store, a small pulsing globe with three distinct lights. red, green and blue. Two mainly sittuated at the rear of globe. moving around towards a general direction of north to south. It moved up and down, left to right. Then following shortly afterward was a giant triangle with two massive headlights at the front illuminating a vast area of the sky. As it gets closer I see there are lights flashing around the sides. All colors of lights on the diamond are white only. Slowly moves over keene from north to south. I lose track of the small globe near the powerlines near the wkbk tower. So i chase down the diamond to head it off at the pass. I go to Knapp and koster parking lot where another bystander wittnesses it with me as it slowly flies directly overhead until out of view. I recorded video with my cell phone as it was overhead but cellphones dont do justice. I know I called the local police and reported a ufo and asked if anyone else had. dispatch said no. They thought it was an april fools joke. It definately was not.