Title: Excavator

Difficulty: Intermediate level with 11 steps.

Objective: This exercise is intended to build an Excavator which performs the following actions:

• Place an object in the robot's path, then turn the robot on.
• When an object is detected in front of it, it will begin excavating.
• If another object is detected while carrying an object, the robot will turn in that direction and it drops the object it was carrying.