Develop a musical composition utilizing the presented motif and adhering to the required structure.
X:1
L:1/8
Q:3/8=110
M:6/8
K:Bb
['dBB TB2']  
X:1
L:1/8
Q:3/8=110
M:6/8
K:Bb
 DFB TB2 c | dBB TB2 g | fed cBc | dBB TB2 f | dfd cfc | Bba gf=e | fcB ABG | AFF F3 |:  