Create a musical composition adhering to the provided thematic and alphabetical guidelines.
X:1
L:1/8
M:2/2
K:G
['G2 ge dBAG', 'gedc BcdB']  
X:1
L:1/8
M:2/2
K:G
 D | G2 ge dBAG | FDAD BDAD | G2 ge dBAG | DFAc BGG :: d | gedc BcdB | Aaag aeef | gedc BcdB | 
 Ggga bg :|  