Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
Q:1/4=120
M:6/8
K:D
['A2 B']  
X:1
L:1/8
Q:1/4=120
M:6/8
K:D
 A2 d | A2 G F2 E | D2 C D2 E | F2 G A2 B | E3 A2 ^G | A2 B c2 B | A2 B c2 d | e2 A BA^G | A3 |:  