This was the first function of the code that is seen in the series. XANA would use the Scyphozoa to possess Aelita and guide her to the Way Tower of the sector she was in (as this tower held all codes that upheld the sector). Once she had entered the code into the tower interface, XANA would have full access to the sector and using this power he would delete the sector entirely. The main purpose of destroying the sectors was to prevent Team Lyoko from accessing Carthage with the Transport Orb. Aelita destroyed the Forest first in Lyoko Minus One, the Desert in The Pretender, she willing used the code to save the supercomputer by destroying the Ice Barrier in Sabotage and finally destroying the Mountains in Double Trouble.