Rest for this solution, some dissolved oxygen to escape, methylene blue is methylene blue restores the glucose to restore. If the repeated oscillations and the reset solution, its color turns blue-Rock-Blues-rock ... This oscillating chemical called methylene blue. It is the result of alternating reaction system of reduction and oxidation reactions. From blue appeared to become colorless is the period of time needed, the oscillation period length of reaction conditions such as solution pH, reactant concentration and significant effects of temperature and other factors. When the reaction is when a number of factors, usually change only one factor, other factors do not change in and controlled experiments to study law.