Craft a musical work based on the specified structure and given theme.
X:1
L:1/8
M:2/4
K:none
['dc/B/ AA FA BA dc/B/ A>A']  
X:1
L:1/8
M:2/4
K:none
[K:D] dc/B/ AA | FA BA | dc/B/ A>A | GA F2 | dc/B/ AA | FA BA | dc/B/ A>A | c>A d z |]  