Create a Global variable with text value called Song then,
choose("Song1", "Song2", etc.)
System > Song =1> Audio >Play Music1
-------------------------> Audio >Stop Music2
-------------------------> Audio >Stop Music3
System > Song =2> Audio >Play Music2
-------------------------> Audio >Stop Music1
-------------------------> Audio >Stop Music3
System > Song =2> Audio >Play Music3
-------------------------> Audio >Stop Music1
-------------------------> Audio >Stop Music2
System > Song =1
On touched P1 > Go to layout X