Create a musical composition adhering to the provided thematic and alphabetical guidelines.
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
['dBG GAB c2 B TA2 G', 'dBd ece']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
 d | dBG GAB | c2 B TA2 G | dBG GAG | A2 B c2 e | dBG GAB | c2 B TA2 G | (B/c/d)B (A/B/c)A | 
 G2 G G2 :| d | dBd ece | dBd ece | efg dBG | A2 B c2 e | def gfe | dcB TA2 G | (B/c/d)B (A/B/c)A | 
 G2 G G2 :|  