Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/16
M:2/4
K:none
['', 'Af e2d2 dFAd Tc2B2 B2Bg feGg feBf', 'B2d2 c2F2 f2>e2 dedc B2cB A^GAB e^def', 'A)GBe (!>!d4 d)Bdg cdef |1 g2g2 g2DB']  
X:1
L:1/16
M:2/4
K:none
[K:D] Af |: e2d2 dFAd | Tc2B2 B2Bg | feGg feBf | edFB A2Af | Te2d2 dFAd | c2B2 B2Bg | 
 (fe).A.c (fe).B.c |1 d2f2 d2Af :|2 d2f2 d2dc |: B^ABc dcde | fedc B2d2 | c2F2 f2>e2 | dedc B2cB | 
 A^GAB c"_c"^Bcd | e^def gfe=d | cA^GA f2>e2 |1 d2d2 d2dc :|2 d2d2 d2DB |:[K:G] (!>!A4 A)GBe | 
 (!>!d4 d)Bdg | gfAB"_c" c2cf | (ed).B.G D2DB | (A4 A)GBe | (!>!d4 d)Bdg | feAB"_c" cdef |1 
 g2g2 g2DB :|2 g2g2 g2AB |:"_c" cBAB"_c" c2g2 | f2>^e2 f^ed"_c"c | BAGA B2f2 | e2>d2 edBG | 
 AB"_c"cd f2e2 | Te2d2 dgB2 | Pd2"_c"c2 ceA2 |1 G2B2 G2AB :|2 G2B2 G2 z2 |]  