Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
M:4/4
K:Bdor
['f2 ef B2 fe']  
X:1
L:1/8
M:4/4
K:Bdor
 f2 ef B2 fe | faef ceAe | f2 ef B2 fe | faec B4 :|  