When you are talking about a sequence of events, you can use adverbs of time, like zuerst, dann and danach.

Zuerst sehen Nico und Emma fern.

Dann/Danach essen Nico und Emma Eis.*

Dann/Danach spielen sie zusammen.*

*The words dann and danach have the same meaning. It does not matter whether you use dann or danach.

The adverbs of time zuerst, dann and danach often come at the beginning of the sentence, before the conjugated verb.