In stage directions where is upstage left

The directions are written from the perspective of the actor facing downstage, or toward the audience. The rear of the stage, called upstage, is behind the actor's back. An actor who turns to his right is moving stage right. An actor who turns left is moving stage left. So if you are to move upstage, you are going behind yourself, and if you move left you are going left. Therefore, You are moving backwards to the left.