Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
Q:1/4=100
M:2/4
K:G
['G/A/ BG- GA/B/ cA- A(d/c/) BA/G/', 'G3 B/c/ dd- dc/d/ ec c2 ee-']  
X:1
L:1/8
Q:1/4=100
M:2/4
K:G
 G/A/ | BG- GA/B/ | cA- A(d/c/) | BA/G/ AG/F/ | G3 :: B/c/ | dd- dc/d/ | ec c2 | ee- ef/g/ | 
 fe/f/ d>c | BG- GA/B/ | cA- Ad/c/ | BA/G/ AG/F/ | G6 :|  