7 white objects fly across blue sky and then disappeared

7 pill sphere shaped white objects flew across the sky with odd darting movements in some kind of formation flight. They made no sound and moved vary quickly.
I attempted to film with my phone . Each time I selected video and hit red record my phone closed back to the home screen. I attempted two times to film and each time my phone bounced to home screen. As they flew they all of the sudden in open blue sky they seemed to pop and disappeared. Meaning they bulged and then disappeared. No sounds the entire time.
The whole things could not have been more than 10 seconds of flight across the whole sky and then gone.
Never seen anything like this in my life.