Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/16
Q:1/8=120
M:2/4
K:G
['g2d2 edBd']  
X:1
L:1/16
Q:1/8=120
M:2/4
K:G
"G" d2G2 d2G2 | dedc B2G2 |"C" c4 cdef |"D" g2d2 e2d2 |"G" d2G2 d2G2 | dedc B2G2 | 
"C" c2ec"G" B2dB |"D" AGAB G4 ::"G" g2d2 edBd | g2d2 edBd |"C" c4 cdef |"D" g2d2 e2d2 | 
"G" g2d2 edBd | g2d2 edBd |"C" c2ec"G" B2dB |"D" AGAB"G" G4 :|  