Disc that emmited beams of light....

To whomever this may concern:  When I was about twelve years old I vacationed at Puerto Rico.  There were many UFO phenomena ocurring there at the time. 
This one night I stayed at an aunt's house and I remember just like it was now, it was ten-thirty p.m. my cousin and I were almost asleep  when we heard a humming sound.  
My aunt yelled out for us to look, my bed was next to a window and when I looked out I saw this disc right on of the windows location it was only aproximately three stories above the ground from us.  I saw it from underneath, it had many lights that made up a circle only not on the edge of the disc but in the center.  the lights were of different colors(red,green,and yellow but I can't say for sure which colors) some of the lights blinked in a timely fashion others wouldn't blink staying lit all the while.  We immeadiately went outside to get a better look but as soon as we got outside it immeadiately but slowly drifted away.  My aunt and uncle tried photographing it as it was drifting away but solely I noticed that as they were photographing it there were invisible beams of light that were pointing at the camera.  These lights were'nt visible, I noticed because I saw the lights reflect on the inside of the house(going through the windows and showing on walls of the inside of the house).  The photos didn't develope, I believe it was directly because of these beams that only I saw.  This is the first time I've reported this and let me add that I am a completely sane and serious person who is studying to become a pastor and social worker.
Witness indicates that date of sighting is approximate.  PD