Beep Gets Louder

Rene and Luka started to explore the land. The land was big and it would take a lot of time before they could find anything much more interesting than this little piece. But still, they were excited and hoped to find anything related to their last discovery. The metal detector was making a very low beep sound and both Rene and Luka heard it. They both looked at each other and as they moved ahead the beep sound was getting louder and louder.