Construct a piece of music built on the supplied alphabet sequence and motif.
X:1
L:1/8
M:4/4
K:D
['A2 =F2']  
X:1
L:1/8
M:4/4
K:D
 DDD | A2 G2 A2 =F2 | z4 z AAA | _B2 A2 =F2 G2 | =F4 z FFA | G=FGAGFED | =C2 C4 C2 | DE=FDAGFE/D/ | 
 D3 z2 |]  