Construct a melodic piece using the alphabet-based musical sequence and the given motif.
X:1
L:1/4
Q:1/4=100
M:2/2
K:G
['G G', 'd d']  
X:1
L:1/4
Q:1/4=100
M:2/2
K:G
 d | G G G G | (d B) g2 | G G B A/G/ | F/G/ A A2 | G G G G | d B g/f/e/d/ | ^c/d/ e A ^c | 
"^*" d2 :: a | d d d d | a f d'2 | d/e/f/g/ a b | a d g d | e d g d | c B e G | F/G/ A D F | G3 |]  