Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
M:6/8
K:D
['A dAd def', 'f/g/ aba']  
X:1
L:1/8
M:6/8
K:D
 A | dAd def | gee e2 g | fga agf | gee e2 A | dAd def | gab a2 g | fdf gec | ddd d2 :: f/g/ | 
 aba agf | gab e2 g | fga Bcd | cde A2 f/g/ | aba a2 a | bab a2 g | fdf gec | ddd d2 :|  