Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
['g2 d g2 b agf g3 efg', 'd3 d2 =f B2 d c2 e']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
|: g2 d g2 b | agf g3 | efg dBG | cAF GBd | g2 d g2 b | agf g3 | efg afd | ge^c d3 :: d2 =f B2 d | 
 c2 e A2 c | Bgf edc | BAG FED | geg fdf | geg fdB | cde dBG | cAF G3 :|  