Tightening head bolts on a frontera 2.2 petrol twin cam?

Stage 1 - 25nm

Stage 2 - 90'

Stage 3 - 90'

Stage 4 - 90'

Looking at the car straight on Start at the middle row right hand bolt,middle left,up 1 bolt toWords cab, then continue clockwise from middle out, you shoul go round this sequence for eace stage