Once upon a time there was a country split into two because of a war. The only path between these two countries is a 20 meter bridge and there is absolutely no other way to get across to the next country. However, due to circumstances, John was separated from his brother on the other side of the bridge and he needs to get across the bridge to find his brother. It would take at least 20 minutes to get to the other side of the bridge.
However, it was forbidden for anyone to go across the bridge and a small hut was built in the middle of the 20 meter bridge and a security guard was stationed there to prevent anyone from crossing the bridge. The guard will chase anyone back to where they came from if they were found crossing.
John researched on this security guard and found that he was a very lazy security guard. He has a habit of taking a nap and wake up only every 10 minutes to check if anybody has been crossing the bridge. Knowing this, John managed to get across the bridge.
How did he do that??
Uh... I copied this from the other forum game.