TWO TANK Filling and defilling program in INTOUCH SCADA

Using a switch two tank should fill and refill. once tank1 has filled second tank received instruction to fill. once second tank has filled first tank has to defilled and after the defilling of first tank, second tank has to perform the defilling task. https://drive.google.com/open?id=1m0LnfN5LzXZTsza6Z6kO7TggcbJkz31d