Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
Q:1/8=120
M:2/4
K:G
['ec BA BG', 'Bd ef']  
X:1
L:1/8
Q:1/8=120
M:2/4
K:G
 g | ec BA | BG EF | GA G/A/B/c/ | dc Bg | ec BA | BG EG | FA DF | G2 G :| G | Bd ef | gd BG | 
 Bd ef | g2 fg | ec BA | BG EG | FA DF | G2 G :|  