Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/4
M:6/4
K:Cdor
['d e3 d2', 'g _a3 g3/2 a/ b f b']  
X:1
L:1/4
M:6/4
K:Cdor
 d | e3 d2 f | c3/2 d/ c =B c d | e3 d2 g | g2 ^f g2 d | e3/2 f/ e d2 e | c3/2 d/ c =B c d | 
 e3 d2 c | c2 =B !fermata!c2 :: g | _a3 g3/2 a/ b | f b a g3/2 f/ e | f2 f f3/2 e/ d | 
 e f g B3/2 A/ G | _A3 G3/2 A/ B | F3/2 B/ _A G3/2 F/ G | A =B c =B c2 | c2 =B !fermata!c2 |]  