code: function turnToSpeeds (turn, speed) {
    turn = Math.max(Math.min(turn, 100), -100)
  
    var reducedSpeed = otherSpeed(turn, speed)
    reducedSpeed = percentToSpeed(reducedSpeed)
    speed = percentToSpeed(speed)
  
    return {
      left: turn < 0 ? reducedSpeed : speed,
      right: turn > 0 ? reducedSpeed : speed
    }
  }
docs: Convert turn in to left and right speeds
  @param  {Number} turn  -100 to 100
  @param  {Number} speed
  @return {Object}