Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
Q:3/8=120
M:6/8
K:C
['G c>Bc dBG e>de gfe ceG Afd', 'c2 g gec A2 d fdB G2']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:C
 G | c>Bc dBG | e>de gfe | ceG Afd | c>dB c2 :: g | gec A2 d | fdB G2 c | ccd e>dc | cBc d2 G | 
 c>Bc dBG | e>de gfd | ceG Afd | c>dB c2 :|  