Saw strange box drone passing by under the plane

This flight was going from Winnipeg to Toronto and at 8:00

I was watching tv show and I see a light from the window and I saw this …. Square drone type box underneath the plane

The plane passed this object but I felt that this object was flying very slowly in the opposite direction.

It was very close under the plane and I was very worried it would hit the plane.

On top of it I could see 3 lights like a traffic light and all were individually (like a traffic light flashing sequence R -> Y-> G) all white colour flashing individually and not simultaneously

Would love any feedback on any suggestions