Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/16
M:2/4
K:D
['ABAF D2FG']  
X:1
L:1/16
M:2/4
K:D
 de |"D" f2f2 fgfe |"D" d2d2- ddcd |"D" e2d2"^(F#7)" c2d2 |"G" B4 c2d2 |"A7" e2e2 efed | 
"A7" c2c2- cdcB |"A7" A2g2 f2e2 |1"D" [df]6 :|2"D" d6 |: FG |"D" ABAF D2FG |"D" ABAF D2FG | 
"D" A2d2 c2d2 |"A7" E6 EF |"A7" GFED C2EF |"A7" GFED C2EF |1"A7" G2B2 A2G2 |"D" F6 :|2 
"A7" G2B2 A2C2 |"D" D6 |]  