1. A method to control a mobile device, the method comprising: determining whether a finger mode in which the mobile device is controlled by tracking a movement of a finger is activated; detecting, when the finger mode is activated, the finger using a camera and tracking the movement of the detected finger via the camera; performing, when the tracked movement of the detected finger corresponds to a mapped motion pattern, a function corresponding to the mapped motion pattern; displaying, after a first event occurs and a second event occurs while maintaining the occurrence of the first event, a first screen corresponding to the first event and translucently displaying a second screen corresponding to the second event on the first screen; and controlling the first screen according to an input touch and the second screen according to the movement of the finger sensed via the camera.