add semitransparency to control boxes #19
add semitransparency to control boxes #19

TurtleRover/Turtle-Rover-Mission-Control,TurtleRover/Turtle-Rover-Mission-Control,TurtleRover/Turtle-Rover-Mission-Control,TurtleRover/Turtle-Rover-Mission-Control,TurtleRover/Turtle-Rover-Mission-Control,TurtleRover/Turtle-Rover-Mission-Control