Create a new document (40X40px) and create a new layer called ‘circle’. Then create a black circle, the size of your entire canvas. Hide your original background layer and then go to edit>define pattern and define your pattern as ‘circlepattern’. Then return to your original document and select your ‘cream background’ layer. Go to blending options and apply your new pattern as part of a pattern overlay. Be sure to reduce your pattern overlay’s opacity to around 7%, to give a subtle retro background effect..