Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
Q:1/4=120
M:4/4
K:D
['F2 D4 F2 A2 AG A8 A2']  
X:1
L:1/8
Q:1/4=120
M:4/4
K:D
|:"D" F2 FE"D" D4 |"D" F2 FG"D" A2 AG |"D" A8 |"D" A2 AA"D" A4 |"Bm" B3 A"G" G2 AG |1"D" F8 :|  