1. A player's turn
2. The DM's turn
3. The system's turn
As a DM, you have a different job at each node.
On the DM's turn, your job is to resolve NPC/monster actions in a way that delivers both narrative and system information.
"The pain from your injuries seems to make the world spin, but all settles into place as you lock eyes with that kenku archer. He winks and takes aim at you."