In what year did schrodinger modify the wave equation and make our current model of the electron cloud?

he modified the equation to form classical physics to fit the concept. In the equation, Schrodinger relates the probability region directly to the energy region. In the result of this action a plot of equations provides a three dimensional picture of the electron cloud. Schrodinger鈥檚 theory of the atom is our current model of the electron cloud.

i need to know what year this happened.In what year did schrodinger modify the wave equation and make our current model of the electron cloud?
he presented his theory in 1956.

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