Zechariah had 8 visions of the end, for Jewish people and all of us in history of church, at the time of the end; of the 4 horses and its colors, to where each one of them will go in the earth. Zechariah: 1. 8. In 1st vision, starts with the red horse, then comes the black one, after that the yellow and last is the white. (Where the Jews will accept the whole Bible and Church at last, after the 4th yellow horse). Yet in the 8th vision,in Zechariah 6-.
2- In the first chariot [were] red horses; and in the second chariot black horses;
3- And in the third chariot white horses; and in the fourth chariot grisled and bay horses. (Each horse has his own color and meaning, white is the Holy Spirit).
Note: In Revelation talks about the horses and their horsemen, that means men acting in the world, bringing war (red horse), hunger (black horse), violence, epidemic and death (yellow horse). This order is the same as de Seals, except the white, which in this is penultimate. (Showing that whoever is with the word, is with the spirit, and wins in any situation and is winning in each period, until the end).

The 5th Seal, has no time is the call of the souls that Will suffer persecution, and it was supposed to wait Just a little more.
6th Seal - Revelation. 6
12- And I beheld when he had opened the sixth seal, and, lo, there was a great earthquake; and the sun became black as sackcloth of hair, and the moon became as blood;
13- And the stars of heaven fell unto the earth, even as a fig tree casteth her untimely figs, when she is shaken of a mighty wind.
14- And the heaven departed as a scroll when it is rolled together; and every mountain and island were moved out of their places.
This event, for its importance is in: Isaiah 3. 9-10. and 34. 4 - 6. Joel speaks 3 times. And Jesus speaking about his 2nd arrival, after the great tribulation, of the abominable, of desolation (the antichrist), and before exhortation, vigilance. Matt. 24.
29- Immediately after the tribulation of those days shall the sun be darkened, and the moon shall not give her light, and the stars shall fall from heaven, and the powers of the heavens shall be shaken: