There are four pillars in Revelation.

The seven churches (1st pillar)

The seven seals (2nd pillar)

The seven trumpets (3rd pillar)

The seven plagues (4th pillar)

Before the sealing of God (2nd pillar), there "must be hereafter" (Rev. 4:1) event, which is the investigative judgment in heaven. The Ch. 4-5 is a vision of the throne room.

I suggest to read the first seal and then the first church, respectively each element of the second pillar to the first pillar.

We notice there appears an interlude between the sixth and 7th seals, which is Ch. 7, where the vision has a prominence of the seventh day Sabbath.

We find a similar structure in the 3rd pillar that also has an interlude between the sixth and the 7th trumpet, which is Ch. 10, where the advent movement proclaims the Sabbath truth.

Therefore, the visions of Ch. 7 and 10 bring our attention to the Sabbath, implying that the restoration of the Sabbath must occur prior to Jesus' Second Coming.

Before God pour out the seven last plagues (4th pillar), He will warn the judgment coming by the seven trumpets' message (3rd pillar).

I suggest to read the first plague and then the first trumpet to discover complementary understanding and do the same all the way to the seventh element. Undoubtedly each element
relates to respective element.

The structure and overview testify to careful student that 4th pillar of the seven plagues correspond to the seven trumpet (3rd pillar), as of God's waring before the wrath of God
poured out to the wicked(4th pillar).

Therefore, the visions of Ch. 12, 13, and 14 unmask Satan's identity for humanity to make ultimate fateful decision whom they want to pay allegiance.

Picture in mind the trajectory of the four pillars:

The Seven Churches => Judgment => The Seven Seals. Reverse perspective also provides clear understanding.
Before the sealing of God => judgment in heaven "must be" happening => the sealing completes in the seven churches (144,000).

The Seven Plagues => Satan's identity unmasked => The Seven Trumpets are for the warning of the Seven Plagues.
Reversely, the Seven Trumpets proclaim "woe, woe, woe" "hereafter" => the three angels' message unmask Satan's ID => the Seven Plagues fall.

Between the 1st and 2nd pillars the prominent message is the Sabbath(Ch. 7).

Between the 3rd and 4th pillars the prominent message is the Sabbath (Ch. 10).

Blessings,

Karen