Construct a musical piece using the given pattern as a foundation.
'Binary', 'Sectional: Verse/Chorus'  
X:1
L:1/8
M:2/4
K:D
 a/g/ | fa df | B_B Ad | c/d/e/f/ ga | f/a/g/f/ ea/g/ | fa df | B_B Ad | c/d/e/f/ gc | df d :| 
[K:A] a | gg g/e/f/g/ | aa a>a | gg g/e/f/g/ | aa a>a | gg g/e/f/g/ | ae fd | cB eG | A3 :|  