Count the head bolts down the head.
If it looked like for example
1,3,5,7,9,11,13,15
2,4,6,8,10,12,14,16
You would tighten in the order. 7,8,9,10,5,6,11,12,3,4,13,14,1,2,15,16
So from the middle, working evenly out. But you also have to stage them down.
So torque to from memory 30nm, then 90nm, then loosen it off to zero, torque to 110nm, then from memory tighten 90-115 degrees over that.