1.
Peter was playing music.
2.
The boys heard a strident noise.
3.
Peter was motionless.
4.
A blue light appeared.
5.
The boys decided to find out more.
6.
The boys were watching an extraordinary event.
7.
They saw a UFO.
8.
Sylvie was collecting some evidences.
9.
The unknown object changed into different colors.
10.
The UFO disappeared without trace.