Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:2/2
K:G
['GDDE GABG cABG E2 EA GDDE GABe', 'dg Bgdg']  
X:1
L:1/8
M:2/2
K:G
 GDDE GABG | cABG E2 EA | GDDE GABe | dBAB (G3 G) :| e/f/g dg Bgdg | cABG E3 E | (e/f/g) dg Bgdg | 
 cAdB G2 G2 | (e/f/g) dg Bgdg | cABG E2 EA | GDDE GABe | dA BA G3 A ||  