Construct a musical piece using the designated motif and sticking to the alphabetical form presented.
X:1
L:1/8
M:4/4
K:D
['f2 fe', 'Acec Acec', 'e2 eg fgag fgef']  
X:1
L:1/8
M:4/4
K:D
 A2 | f2 fe f2 eg | f2 fe d2 A2 | defg afed | e6 :: A2 | Acec Acec | Acec A2 g2 | fafd egec | d6 :: 
 f2 | a2 af a2 af | abag fefd | d2 df e2 eg | fgag fgef | d2 dg e2 eg | fgag fgef | d6 :|  