Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/16
Q:1/2=70
M:2/4
K:G
['g4 f2e2 d2G2G2A2 (Bcd2) c2B2 A6 B2', 'd8 a4 f2d2 gab2-b2 a2 g2fe f2ed']  
X:1
L:1/16
Q:1/2=70
M:2/4
K:G
 g4 f2e2 | d2G2G2A2 | (Bcd2) c2B2 | A6 B2 | (cd e4) d2 | (fg a4) g2 | f2(ed) e2(dc) | d8 || 
 a4 f2d2 | gab2-b2 a2 | g2fe f2ed e4 (efg2) | d4 B2G2 | cde2 e4 | d2cB cBAG | FGAF D4 | EFGE FGAF | 
 GABG ABcd | B2AG D2EF | G8 |]  