Create a musical composition adhering to the provided thematic and alphabetical guidelines.
X:1
L:1/8
Q:1/8=180
M:2/2
K:G
['GBdg egdB GBdg (3efg', 'dg g2 bg g2 dgfg']  
X:1
L:1/8
Q:1/8=180
M:2/2
K:G
 D | GBdg egdB | GBdg (3efg dg | eAcA eAcA | cdef gedB | GBdg egdB | GBdg (3efg dB | cdef gedc | 
 BGAF G2 z2 || dg g2 bg g2 | dgfg (3efg df | eAcA eAcA | cdef gedB | dg g2 bg g2 | dgfg e2 dB | 
 cdef gedc | BGAF G4 |]  