Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/4
M:2/4
K:Gdor
['G A B']  
X:1
L:1/4
M:2/4
K:Gdor
 z G | G A | B d | c B | A2 | G3/2 A/ | B c | d3/2 _e/ | d d | G A | B G | A B | c B/c/ | (d2 | 
 d) d | d f | e d | c B | A3/2 A/ | B d | c B | A ^F | D B/c/ | d2 | c/B/A/G/ | ^F/G/ A | G2 ||  