Flag of Bosnia and Herzegovina

The national flag of Bosnia and Herzegovina contains a medium blue field with a yellow right triangle separating said field, and there are seven full five-pointed white stars and two half stars, top and bottom, along the hypotenuse of the triangle. The three points of the triangle stand for the three main ethnic groups (or "constituent peoples") of Bosnia and Herzegovina: Bosniaks, Croats, and Serbs.

Source: Wikipedia — Flag of Bosnia and Herzegovina (CC BY-SA 4.0)