Bridges and a pesky brother #1

Warlin was a tired young pnome. He had been gone for a long time collecting mushrooms. Warlin was the oldest child and that meant lots of chores for him. But he didn’t mind that much. He was almost home now. All he had to do was to go over two drawbridges that crossed two dangerous rivers.

Warlin came to the first river. The drawbridge was raised. Normally all he had to do was to push a lever and the bridge came down. To Warlin’s surprise, the lever was surrounded by an iron cage with a lock on it. He could not reach the lever unless he opened the lock. It must be his pesky younger brother, Twerpin, playing one of his practical jokes. Oh well, thought Warlin, I’ll just open the lock. It was a combination lock. The first 5 rows of digits were already entered.

All Warlin had to do was to figure out the pattern and enter the last row of digits. He began to think about it.