Now that you have mastered some basic flight in open areas, we will turn our attention to precise handling in the vicinity of and relative to other objects. In addition to more focus on the camera controls, you should introduce video recording and snapshots as part of each exercise.
Your goal is to improve your ability to follow the line as closely as possible and at a constant speed, but you should increase your speed in the later repetitions as you begin to get comfortable with the controls. For the lateral movement, try to maintain a fixed distance and remain perpendicular to the line as best as possible.