Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
M:3/8
K:G
['A>GA cBc/A/ A3']  
X:1
L:1/8
M:3/8
K:G
 D | G>FG | A>GA | cBc/A/ | A3 | B2 c | cBB | c/B/AG | A>BA | G2 D | GFG | A>GA | cBc/A/ | A3 | 
 Bc/B/c/B/ | B>cB | c/B/AG | B2 A | G2 |]  