Craft a musical composition that adheres to the specified musical theme and letter-based structure.
X:1
L:1/4
M:3/4
K:G
['E E']  
X:1
L:1/4
M:3/4
K:G
 E | E B B | B A B | G F G | D2 B,3/4 B,/4 | E E E | G F E | A G A | B2 E/F/ | G G G | A G A | 
 B c d | e d d | e d B | c B A/A/ | B E E | F D D | E3 | B3 | A G F | E2 ||  