Me and 2 other friends were roaming around our campus at the University of Campus when both of us spotted a blue light just race across

Me and 2 other friends were roaming around our campus at the University of Essex Campus when me and another friend spotted a blue light just race across atop of Wivenhoe House( which is a small hotel on our campus). It is a pretty isolated place at night and this area is surrounded by trees and an open field. It was a dark blue type light a bit like a fireball and it just raced across almost very quickly like it was in a blink right atop of wivenhoe house it seemed as if it would just touch the building but it was very very close to it and just quickly raced past towards the southeast direction.It came and went. This is not a joke none of us do drugs we’re all first year students who have just moved into university and this was an experience to witness since I’m interested in the universe out there. This is not a hoax kindly investigate this thank you.