Construct a musical composition utilizing the provided motif and conforming to the specified structure.
X:1
L:1/8
M:4/4
K:G
['', 'dB B2', 'eGdB cCGc BdGB'  
X:1
L:1/8
M:4/4
K:G
 D |: G3 B dB B2 | gBeB dB B2 | ceAc BdGB | Add^c dedB | G3 B dB B2 | gBeB dB B2 | ceAc BdGB |1 
 AdFA G2 z D :|2 AdFA G2 Bd |: g3 f gdBd | gGfG eGdB | cCGc BdGB |1 Add^c defd | g2 gf gdBd | 
 gGfG eGdB | cCGc BdGB | AdFA G2 Bd :|2 AcAG AGFe | BGdG eGdG | gGfG eGdB | cCGc BdGB | 
 AdFA G2 B ||  