how does the equillibrium price of a normal commodity change when income of its buyer falls. explain the chain effect with diagram

When the income of the buyer falls, the demand for the normal good decreases. Therefore, the demand curve make the leftward shift, creating a situation of excess supply in the market. Producers, i order to sell off the excess quantity, compete with each other to bring the price down. These movements continue till a new equilibrium is achieved at a lower equilibrium price and lower equilibrium quantity.