Create a musical composition adhering to the provided thematic and alphabetical guidelines.
X:1
L:1/8
M:4/4
K:G
['BdGA BdGB AGFA G3']  
X:1
L:1/8
M:4/4
K:G
 BdGA BdGA | BdGA B3 c | BdGA BdGB | AGFA G3 A | BdGA BdGA | BdGA B3 c | BdGA BdGB | AGFA G3 d | 
 e3 f g2 af | gedB d3 A | BdGA BdGB | AGFA G3 d | e3 f g2 af | gedB d3 A | BdGA BdGB | AGFA G3 c :|  