Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
Q:1/8=180
M:4/4
K:D
['AD D2', 'df f2 af f2']  
X:1
L:1/8
Q:1/8=180
M:4/4
K:D
 AD D2 ADBD | ADFD EFGB | AD D2 A2 Bd | egfe dBBd :| df f2 af f2 | defd edef | df f2 af f2 | 
 (3efg fe dBAB | df f2 af f2 | defd e2 fg | afbf afeg | fged BedB ||  