Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/8
M:6/8
K:D
['D2 D FED F2 A d2 A', 'B BAB']  
X:1
L:1/8
M:6/8
K:D
 D2 D FED | F2 A d2 A | Bcd A2 F | G2 F E2 D | D2 D FED | F2 A d2 A | Bcd A2 F | EFE D3 || 
 B2 F F=F^F | d2 B BAB | F2 B BAB | b2 f fef | g2 e f2 d | e2 c d2 A | Bcd A2 F | E2 D D3 ||  