News editors obtained the following quote from the background information suppli ed by the inventors:“Robotic devices can autonomously or semi-autonomously navi gate environments to perform a varietyof tasks or functions. The robotic device s can utilize sensor data to navigate the environments withoutcontacting obstac les or becoming stuck or trapped. As robotic devices become more prevalent, ther e is aneed to enable the robotic devices to output light and/or audio in a spec ific manner as the robot navigatesthe environment. For example, there is a need to enable the robotic devices to output light and/or audioto indicate an alert to an entity in the environment in a safe and reliable manner.”