Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/8
Q:1/2=50
M:4/4
K:G
['d2 B>c d>edB A2 dF G2 G2', 'd g>ab>b afzd e>fgg bdzd b2 (a/g/f/e/)', 'd/^c/d/e/ d=c Bgzd']  
X:1
L:1/8
Q:1/2=50
M:4/4
K:G
 B>c | d>fed d2 B>c | d>edB A2 dF | G2 G2 G3 B | Aedc B2 B>c | d>efe d2 B>c | d>edB A2 dF | 
 G2 G2 G3 B | Aedc B3 d || g>ab>b afzd | e>fgg bdzd | b2 (a/g/f/e/) a2 bg | f2 e2 d2 z d | 
 (e>fgg) fdzB | (c>dee) dBzG | c2 BA B (g2 d) | cBAG d4 || e>fgg fdzB | c>dee dBzG | 
 c2 (B/A/) B g2 (f/e/) | (e/d/c/B/) d/c/B/A/ G2 z d | d/^c/d/e/ d=c Bgzd | d/^c/d/e/ d=c Bgzd | 
 d/e/f/g/ a/b/c'/d'/ b/g/ze/c/ z | B2 A2 G2 |]  