Compose a musical piece in accordance with the outlined theme and structure.
X:1
L:1/16
M:2/4
K:none
['F2A2{/B} A^GA2 G2B2{/c} B^AB2 ABcd', 'ffd2 ffd2 e2e2 efg2', 'f4 e4'  
X:1
L:1/16
M:2/4
K:none
[K:D] F2A2{/B} A^GA2 | G2B2{/c} B^AB2 | ABcd efga | gfed cBAG | F2A2{/B} A^GA2 | G2B2{/c} B^AB2 | 
 ABcd efgc | d2f2 d2 z2 :: ffd2 ffd2 | e2e2 efg2 | eec2 eec2 | dcdc dfa2 | ffd2 ffd2 | e2e2 efg2 | 
 e2ec e2ec | d2f2 d2 z2 :|[K:G] g4 f4 | e4 d4 | fefe f2d2 |"_c" c2c2 c2df | a4 g4 | f4 e4 | 
 fefe f2d2 | B4 z def | ggg2 fff2 | e2e2 d4 | e^ded e2g2 |"_c" c'6 e2 | d2bb b2d2 |"_c" c2aa a2AB | 
"_c" c2d2 e2f2 | g2b2 g2 z2 |]  