1;  The seven angels with the seven last plagues.
  3;  The song of them that overcame the beast.
  7;  The seven vials full of the wrath of God.

 * I saw.
  12:1-3  Da 4:2,3  6:27 
 * seven angels.
  6  8:2,6  10:3  16:1-17  21:9  Mt 13:41,42,49,50 
 * last.
  8:13  11:14  16:17-21  17:1 
 * is filled.
  7  14:10,19  16:19  19:15  Da 12:6,7,11,12