(1) Play a sound from a musical instrument such 
                                as a keyboard. (Single note is desirable) 
                                (2) Analyze the pitch of the sound with Arduino. 
                                (3) Each animal corresponding to the note of C, 
                                D, E (Do, Re, Mi) advances. 
                                For example, when the sound of E(Mi) is played, 
                                the third animal (because E(Mi) is the third 
                                note of C,D,E...) moves forward. 
                                If the note F is played, the fourth animal moves 
                                forward. 
                                (4) The animal in the foreground wins when one 
                                song has finished playing. 
                                 
                                Older versions used fans to advance balloon 
                                animals. |