I agree with Bouman on his initial statement of the OP, even though he has an incorrect understanding of it, but he is also correct on the writing of Revelation. It is all based on numbers and seven is a very common number which means complete. Revelation is divided into seven parts, each part repeats. Here are those divisions.
1. Rev 1-3
2. Rev 4-7
3. Rev 8-11
4. Rev 12-14
5. Rev 15-16
6. Rev 17-19
7. Rev 20-22
All sections repeat the history of the church from the first advent of Christ to His second coming. Thus most of it is past history with the second coming, judgment and new heaven/new earth in the future. It depicts a war that is occurring between Christ and Satan and secondarily with Christ's Church. A war that has been in existance since Satan fell from Heaven.
The first three deal with the real, live, on earth church and Christians in their struggle against powers and principalities, Satan. All speak of promise, hope and admonition. Basically, stay the course, overcome, Christ will triumph.
The next two are a transition between the real world, reality and the spiritual and mystical struggle of the church against Satan. The message is the same, promise and admonition.
The last two are totally spiritual, or mystical and deals with the underlying real struggle going on between Christ and Satan.
Thus Revelation gives us an ever deepening understanding of what is happening in the world and an ever spiraling revelation of the destiny of man from God's perspective and revealed to John by visions.