Back in Russia Prokofiev settled in Moscow. He wrote several children’s pieces including "Peter and the Wolf". He was asked to write music for two important jubilees: the 20th anniversary of the Revolution and the centenary of Pushkin’s death. He took great care over this music. Much of what he wrote was to be directed by Meyerhold, but Meyerhold was arrested, later tortured and murdered so the whole project never happened. Some of the music written for the Pushkin centenary was later used in his opera "War and Peace", the "Stone Flower" ballet and Symphonic Waltzes. He also wrote a very large piece called "Cantata for the Twentieth Anniversary of the October Revolution", using words by Marx, Lenin and Stalin for a total of 500 performers. The music included realistic effects such as gun shots, machine-gun fire and sirens. However, many critics said that the music was vulgar, and it was not performed until 1966, long after Prokofiev’s death. He tried to make the soviet authorities pleased by writing a "safe" opera called "I am the Son of the Working People" but the politicians stopped it during its early auditions. The opera was going to be produced by Meyerhold, but again it never happened because Meyerhold was arrested and executed.