Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
M:4/4
K:D
['vA>vduB>ud A>dB>d A<A d>e f3 d g<g', 'A2 a>df>d a>df>d a<ad>e f3 a |1']  
X:1
L:1/8
M:4/4
K:D
|: vA>vduB>ud A>dB>d | A<A d>e f3 d | g<g g>b a>fe>d | e>fe>d B2 A2 :: a>df>d a>df>d | 
 a<ad>e f3 a |1 b>eg>e b>eg>e | b<b e>f g2 (f>g) :|2 b>ga>f g>ef>d | e<g f>e d3 B |]  