Create a musical composition adhering to the provided thematic and alphabetical guidelines.
X:1
L:1/8
M:4/4
K:G
['DGBG AGBG DGBG AGEG DGBG A3 B', 'BGGd B3 c dgef g2 fg eA']  
X:1
L:1/8
M:4/4
K:G
 DGBG AGBG | DGBG AGEG | DGBG A3 B | dged BAGE | DGBG AGBG | DGBG AGEG | DGBG A3 B | dged BGGd || 
 B3 c dgef | g2 fg eA A2 | B/c/d ef gage | dBAc BGGd | B3 c dgef | g2 fg eA A2 | B/c/d ef gage | 
 dBAc BAGE ||  