Compose a piece of music that follows both the given musical theme and the letter-based structure provided.
X:1
L:1/16
M:2/4
K:G
['GABc d2d2 edcB']  
X:1
L:1/16
M:2/4
K:G
 G2de d2cB | c2d2 B4 | c2B2A2G2 | A2d2 G4 | A2GA B2AB | c2Bc d2e2 | d4 edcB | A2cB A2d2 | G4 GABc | 
 d2d2 edcB | A2>c2 B2AG | d2d2 AcBA | G4 A2AG | B2BG A2AG | B2>A2 GABc | d2d2 edcB | AcBA G4 |]  