strobe ufo over catalina

if you can imagine looking straight over your head and seeing a large clock in the sky......it was shortly after dusk, i was at a boy scout camp at cherry cove on catalina island, we were all around a bonfire as the camp directors were doing some sort of presentation..dressed like indians rowing a canoe to shore...i cant remember if i was already looking or if it was the sounds of a couple other people noticing it first that drew my attention to the sky...the was a flashing object that was moving very fast...back to the clock int the sky....it was moving from 12 to 6 going what i belive to be south to north...when it got to what would be the middle of the clock it shoot straight out to the 3 oclock position then turned to go back towards the north...making like a chair pattern in football that the inly imiage i get in my head when i think about it...then it started to move all over in what appered to be no specific direcection travling what had to be great distances in a blink of an eye, changing directions even quicker...then it shoot off to the north off in to the horizion...it appeared to be hovering and spinning over the ocean and started to shoot things out from the top and bottom of the ship...?the flash was bright white....
Witness indicates that the date of the sighting is approximate.  PD