2/365 Delicate pink flowers

I have no idea what this bush actually is, but I noticed its delicate pink flowers outside my window and wanted to be sure I photographed it.

The flowers themselves are only about the size of a dime, and they have four perfectly symmetrical petals that form an open circular shape. The leaves of the bush are a dark, brick red, which is the predominant feature through most of the growing season.

Whatever it is, I like it!

Camera: Canon 40D with 60mm macro lens, 1/125s, f/2.8 at ISO 1000 at about 7:45 p.m.