The seven seals were being opened. In between the opening of the sixth and seventh seals, there is an interlude described here.
A PAUSE IN THE ACTION – Vss. 1-3
THE PLACEMENT OF THE SEAL – Vss. 4-8
(This was a seal of protection and ownership.)
THE PRAISE IN HEAVEN – Vss. 9-12
THE PEOPLE WHO WORSHIPPED – Vss. 13-17