Looking into inversion, I found a website listing different types of inversion, but I can't understand intro adverbial.

The website says that inversions in this case are optional, and gives the following examples:

Into the room ran the lady.

First comes love, then comes marriage.

After A comes B, then comes C, next comes D.

Down came the rain and washed the spider out.

Now, this examples are extremely hard for me to "restructure", I hope I can receive some help, this is the best I was able to come with:

Into the room, the lady ran.

First comes love, marriage comes then.

After A comes B, C comes then, D comes next.