Meaning and Expression. According to the ballet scenario, the music of Block 7 represents “the old showman of the fair entertaining the crowd from the height of his booth.” In the music that eventually follows, the showman will produce three puppets (Petrushka, the Ballerina, and the Moor), and magically bring them to life. Block 7 accordingly shifts our attention musically from the relatively diatonic music of the human crowd to the relatively chromatic music of the fantastic, magical world of Petrushka and his fellow-puppets.