Custom Boss Character AI

Alright, so, i've got who basic animations for this character, a flying idle animation, and a flying tackle animation. I want to this character to fly in her idle state around the room in a circle for a few seconds, pause, look at the the player, and then tackle him, and then pause when she's on the other side of the room, and then go around the room again (and just repeat that until her HP reaches 0). So basically, i need this boss to have these actions:

Fly in a circle around the room Attack(tackle) and do 10 damage have health so damage can be done to her when certain colliders hit (like projectiles) for her to disappear when her health reaches zero

How would you guys go about scripting something like this? do i need multiple scripts? is there a tutorial video? thanks for reading!