Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
Q:1/8=150
M:2/2
K:G
['GABc edcB agfe d3 c BdBG cecA', 'fafd gbge']  
X:1
L:1/8
Q:1/8=150
M:2/2
K:G
 GABc edcB | agfe d3 c | BdBG cecA | BdBG GFED | GABc edcB | agfe d3 c | BdBG cecA | G2 F2 G2 :: 
 z2 | defg fafd | gbge fafd | defg ac c2 | BdBG FAFD | BdBG cecA | fafd gbge | fgfe dcBA | 
 G2 F2 G4 :|  