Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
Q:1/2=80
M:4/4
K:G
['D2 G2 G>B A2 A>c B2 g>e{e}', 'G2 D2 d>edc B2 B2 c>dcB{B} TA4']  
X:1
L:1/8
Q:1/2=80
M:4/4
K:G
 D2 | G2 G>B A2 A>c | B2 g>e{e} Td3 c | B2 (3dBG A2 (3cAF | G2 G>G G2 :: D2 | d>edc B2 B2 | 
 c>dcB{B} TA4 | d>ed>c B>cB>c | de d(c/B/){B} TA3 D | G2 G>B A2 A>c | B2 g>e{e} d3 c | 
 B2 (3dBG A2 (3cAF | G2 G>G G2 :|  