Craft a musical work adhering to the specified theme and structure.
X:1
L:1/8
M:4/4
K:G
['f>e dA A>F A2 z f/e/ dB', 'f/>g/ a>baf a3 d b>c ba b3'  
X:1
L:1/8
M:4/4
K:G
 f>e | dA A>F A2 z f/e/ | dB B>A B2 z d | A>Bdd e>fab |{g} af{f} ed B4 :: f/>g/ | a>baf a3 d | 
 b>c ba b3 d | afed d>efb |{a} bf{f} ed B4 :|  