triangular craft sigtings in utah

we were driving in a national park called capitol reef in southern utah (and we saw a craft of the same shape as the ones discribed below but this one was following us it migt have been 1 of the 2 that we saw were not sure though) heading for moab when we decided to take a shortcut on an old mineing road about ten miles down the road we saw two blinding lights hovering about 20 ft away and 20 ft off the ground so we imedieately turned off the engine and lights because weve seen them many times up in the sky (they fly in a certain pattern left,right,left and then do a loop)but thes ones just moved breifly we waited for about 15 minutes then turned on the engine and lights then there was a flash of light and they were gone we have also seen them in the book cliff area all of which dont make any sound! and it is usualy dark
Date is not indicated by witness.  PD