Place the robot in front of paper cup(10cm forward). And then run the program.

Once you grab a paper cup, do twice a change in direction of 90 degrees.

Direction has been switched 180 degrees.

Then, advancing only 10cm. Program is completed

Here is the program was completed. It was too long though. It was repeated twice to move forward, so, we use a " to create a subroutine" and "to run a subroutine ".
[DOWNLOAD] Program was created (for Robolab2.9)

[Movie] running this program (I'm sorry. Does not contain sound)