A device is provided. The device includes one or more of a plurality of sensor/light source groups, each including a sensor, a first light source of a first color, and a second light source of a second color, arranged in sequence along an expected direction of travel of an object. The device also includes a device to track objects, coupled to the plurality of sensor/light source groups, and configured to drive first light sources in response to playback of a stored sequence and drive second light sources in response to received active sensor outputs from sensors of the plurality of sensor/light source groups.
Visual biofeedback apparatus