Between my breast there was small light brown patch. few months ago, there was another one on side it looked like it was copy of the original, the shape was same but they are not connected. now there 5 light/dark it doesn't itch or pain or hurt?

Pigmented skin areas are usually benign. To determine the cause ofnyour pigmented areas requires a physical examination. Best choice wold be to see a Dermatologist, a skin specialist, for an answer based on actual visualization. Second alternative, almost the same quality, would be to have virtual examination on one of the many paid examination sites. If it was me, I'd go see a skin doctor.