Compose a piece using the alphabetic notation of the assigned musical structure and the provided melodic motif.
X:1
L:1/8
M:2/4
K:D
['af ec AF A/B/A/G/ D']  
X:1
L:1/8
M:2/4
K:D
 f/e/ |"D" dA FA |"D" d>c df |"A7" e>d cd |"A7" ef g(3(c/d/e/) |"D" af ec |"G" d/e/d/B/"D" AF | 
"G" GB"A7" A/B/A/G/ |1"A7" FD"D" D :|2"A7" FD"D" D z |:"D" f>e fd |"G" Bg g2 |"D" f>e"B7" fa | 
"Em" gf"A7" ed/f/ |"D" af ec |"G" d/e/d/B/"D7" AF |"G" GB"A7" A/B/A/G/ |1"A7" FD"D" D z :|2 
"A7" FD"D" D |]  