Money Making (any level)

Here's a way to make money for all levels. Requirements: Knowledge of the Grand Exchange, 1000 coins and 6 buckets. First with your 1000 coins go buy all the clay you get get from the Grand Exhange, go to any water source and fill up your buckets with water. After you do that, use the buckets on the clay to make soft clay. Then go to the grand exchange and sell all the soft clay you have. When you sell the soft clays you should have double the money you had before. Keep doing this and if you don't give up(it get's boring when you have a lot of clay) you should have at least 1 million coins by the end of the week.