Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
Q:1/2=96
M:4/4
K:G
['GABc edcB agfe e2 d2', 'fafd gbge']  
X:1
L:1/8
Q:1/2=96
M:4/4
K:G
 GABc edcB | agfe e2 d2 | BdBG cecA | BdBG GFED | GABc edcB | agfe e2 d2 | BdBA cecA | G2 F2 G4 :: 
 defg fafd | gbge fafd | defg afed | BdBG FAFD | BdBG cecA | fafd gbge | dgfe dcBA | G2 F2 G4 :|  