Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/8
Q:1/2=80
M:4/4
K:D
['D2 (FG) A2 A3 B A2 (GF)', 'd2 f2']  
X:1
L:1/8
Q:1/2=80
M:4/4
K:D
 D2 | (FG) A2 A3 B | A2 (GF) E2 (FG/A/) | F2 (ED) (FG) A2 | d6 :| fe | d2 f2 d2 f2 | 
 (ef)(ed) B3 c | d3 B (AF)(dF) | B A6 (Bc) | d3 B A2 (GF) | (EF)(GA) B3 d | (AB)(AF) (EF)(ED) | 
 G4 A4 | (Bc)(dB) (cd)(ef) | d6 |]  