Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
Q:1/8=150
M:2/2
K:D
['(3ABc d2 F2 A2 BA G2', 'c2 B2']  
X:1
L:1/8
Q:1/8=150
M:2/2
K:D
"^barn dance" (3ABc | d2 F2 A2 BA | G2 C2 E3 D | CDEF GFGA | (3BcB A2 A2 (3ABc | d2 F2 A2 BA | 
 G2 c2 e3 f | gfed cABc | d2 d2 d2 :| AG | F2 A2 dfed | c2 B2 G3 d | c2 B2 EFGA | (3BcB A2 ABAG | 
 F2 A2 dfed | c2 B2 G3 f | gfed cABc | d2 d2 d2 :|  