Original Sentences: It started to rain. We got soaked. We ran into the building. The thunder and lightning lasted for hours.
Short and choppy right? Here is the same sentences but with sequence words.
Sequenced Sentences: Earlier, it started to rain. Therefore, we got wet. Finally, we ran into the building. After, the thunder and lighting lasted for hours.
Not as short and choppy right? Sequence words can make a difference in what you write and your writing has a lot more taste.