strange, amber lights unlike conventional airplane lights

I was standing on my balcony watching the night sky.  At approximately 1930 hours 8-10 amber lights appeared in a random, but close-knit order.  The lights stayed on for about 5-10 seconds and then went out.  About one minute later, the lights appeared again in a similar manner.  This happened repeatedly in one minute increments.  There was no sound associated with the lights. After a few minutes I called my 14 year old daughter to the balcony to observe the lights with me.  She observed the lights for approximately five minutes.  When the lights made their final appearance, they were completely aligned, as opposed to the random order of the previous sightings.
Witness indicates that date of the sighting is approximate.  PD