Create a musical composition adhering to the provided thematic and alphabetical guidelines.
X:1
L:1/8
M:4/4
K:Dmix
['GE DEGA', 'eA A2 Bdeg']  
X:1
L:1/8
M:4/4
K:Dmix
 DEGA BG G2 | BGdB AB GE | DEGA Beed | BAAB A2 GE | DEGA BG G2 | BGdB AB GE | DEGA Beed | 
 BAAB A2 Bd || eA A2 Bdeg | dG G2 GABd | eA A2 Bdeg | dBGB A3 d | eA A2 Bdeg | dG G2 GABd | 
 eggg edea | gedB ABGE |]  