7 Colored Balls of Light seen north of beach access at 82nd Ave N. in Myrtle Beach,SC Aug 1986

A  girlfriend and I were walking on the beach north of 82nd Ave North in Myrtle Beach, SC.  There are no Hotels and no lights on this area of the beach.  It was a clear night.  We were sitting on the beach looking out toward the ocean when my friend pointed out the light that were coming up the beach. 6 Balls of light.  All playing follow the leader.  The Balls were of different colors Blue, Green, Red, and Orange.
The first 3 balls were the size of SOFTBALLS held at arms length. The last 3 were the size of a golf ball held at arms lenght.  We saw the Balls travel from the south going north follow the coast line. The Objects were about 200 Yards out over the surf.  The water was very calm that night and there was no breeze.  The Balls were casting no reflection on the water.  They were at most 100 feet above the water.  We heard no sound from the objects.Speed of objects above 100mph plus or minus.
The six Balls passed by and went another 50 or son yards and went straight up. They traveld upwards for about 10 seconds and were gone.  About 1 minute later small red ball was seen travling at a HIGH rate of speed following the same path as the 6 before came by us, went up, and was gone.   Total time of sighting was about 3- 4 mins.
I was a LifeGuard on the Beach not far from were we saw these Objects.  My friend i meet that week on the beach.  I am from Myrtle Beach  She was from Ohio.
Date is approximate.  PD