Two black snakes are on trees

I’m guessing you mean actual black snakes, not some kind of vision or dream, since this was catagorized as “animals”. Black snakes are rarely dangerous, most often they’re garden snakes, and the small size makes it seems even less likely they’d be a danger. Now, did these snakes actually enter your house, through a doorway or some other kind of entrance, or did you see them slip into a crack between the bricks of your house?

In the summer, I often see small black snakes slide between the gaps in the bricks and take a nap. Sometimes they’ll poke their heads out and sun their top half. They can’t get into your house through the cracks in the bricks, so I wouldn’t worry. It’s actually pretty cute to watch them sunning.