Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/8
M:6/8
K:G
['G2 E', 'gbg ege']  
X:1
L:1/8
M:6/8
K:G
"Em" EFE G2 E | B2 E G2 E |"D" DED F2 D | A2 D F2 D |"Em" EFE G2 E | B2 E G2 E |"G" BcB"D" cBA | 
"Em" BGE E2 :| e |"Em" gbg ege | gbg ege |"D" faf dfd | faf def |"Em" gbg ege | gbg ege | 
"G" gbg"D" faf |"Em" bge e2 f |"Em" gbg ege | gbg ege |"D" faf dfd | faf def |"Em" gfe"D" agf | 
"G" bag"D" fed |"G" BcB"D" cBA |"Em" BGE E2 |]  