Develop a musical composition utilizing the presented motif and adhering to the required structure.
X:1
L:1/8
Q:1/2=90
M:4/4
K:G
['dBAG cAGF', 'G4 B4 d4 cAGF BGFE DEFG ABcd'  
X:1
L:1/8
Q:1/2=90
M:4/4
K:G
 G4 d4 | dBAG cAGF | G2 B4 d2 | cecA FAFD | G4 B4 | dBAG cAGF | Ggfe{e} d2 cB | cAGF G4 :: B4 d4 | 
 cAGF BGFE | DEFG ABcd | efd^c dABc | d4 g4 | afed ged^c | d2 (ef) ged^c | d6"^*" (Bc) | d4 =f4 | 
 ecGE CEGc | e4 g4 | fdAF DFAd | f2 a2 fedf | gdcB BAGF | Ggfe{e} d2 (cB) | cAGF G4 :|  