Gradually dialling back diet?

Hi guys,

My diet is coming to an end in four weeks time. I've been on a high caloric deficit (losing 2 pounds a week) and I intend to do a slow lean bulk afterwards with a small caloric surplus (gaining .5 pounds a week). How should I go about making the transition? I was thinking add 250 calories each week, or should I add 500 every 2 weeks or what is the recommended way of doing this? What thing I'm afraid of is if my metabolism has adapted to the steep caloric deficit, will I continue to lose weight each week or will even the small caloric increase each week actually add weight? I still want to lose approx. 4 more pounds. Thanks.