Rainbow

constructor()
constructor(startHue: Float)
constructor(startHue: Float, stopHue: Float)
constructor(startHue: Float, stopHue: Float, speed: Float)
constructor(startHue: Float, stopHue: Float, speed: Float, direction: Direction)
constructor(startHue: Float, stopHue: Float, speed: Float, direction: Direction, repeatAfter: Int)