I was outside my home smoking a cigarette when I witnessed a bright white orb in the night sky heading east in a straight path at a high elevation. The lack of sound was what first caught my attention and caused me to keep observing the craft, as it's not unusual to see planes in the sky around here at night. After approximately 2-3 minutes of watching this craft, two more craft appeared,(multicolored orbs) both of these craft were noticably smaller,at much lower and further out points either side of the initial craft. Almost as soon as these craft appeared in sky they started to buzz the white glowing craft. They were literally dropping back, zooming in, swapping sides as they harrassed the initial craft. It was like watching a couple of smaller birds harass a larger threat; this continued for approx five minutes until the larger craft just disappeared, at no point during this harassment did the initial craft change direction. It's course stayed true until it left.The two smaller multicolored craft then stayed in the area pulling manouvers that covered the entire night sky. Which I watched until I got bored and went back inside.I did try to get my neighbour to come out and see it as well, but he was too afraid.