I was sitting on the patio drinking my morning coffee looking into this white low lying fluffy cloud. I often watch clouds change shape so I was waiting for this cloud to change shapes when I suddenly noticed an opaque black object suddenly do a loop in the cloud and then race his small straight vehicle to the end of the cloud from right to left as if it was a joyful experience and I felt such joy as I saw his happy flight. As he reached the edge of the cloud he suddenly came to an abrupt stop. It was at that time I observed ten different vehicles which seemed to be like this one just hover without much movement in a circle, kinda like wild birds would. They then seemed to appear more bommerang in shape. I blinked several times thinking I cannot be seeing this but the vehicles stayed in the circular pattern moving all about hovering but not losing the circle formation, like shooting from one spot to another. I then thought I need my cell phone or camera but knew if I left they would be gone so I went to the patio and called my husband. When I turned back the circle of vehicles were gone and I just barely saw two of the objects which once again looked black and straight now streaking to the North then dissapeared completely.