code: func (d *Driver) Hover() {
  	d.cmdMutex.Lock()
  	defer d.cmdMutex.Unlock()
  
  	d.rx = float32(0)
  	d.ry = float32(0)
  	d.lx = float32(0)
  	d.ly = float32(0)
  }
docs: // Hover tells the drone to stop moving on the X, Y, and Z axes and stay in place