connect two propane cylinders together with pipe. Put a pressure valve on it for safety purposes. Put a fill valve on top of one and a release valve on the bottom of the other. Connect the release...
Lets see... I am only a teenager and a year of life is worth 129000 and I am about 13-15 years old so I times 129000 by 14 which is the mean of 13, 14 and 15. So its 1806000 $ So I worth 1806000