Construct a piece of music built on the supplied alphabet sequence and motif.
X:1
L:1/8
M:4/4
K:G
['G2 (BG)', 'g2 (bg) agfd (ed).e.f']  
X:1
L:1/8
M:4/4
K:G
|: G2 (BG) BddB | c2 (ec) eggB | G2 (BG) Bcdg | edcB A2 G2 :| g2 (bg) agfd | (ed).e.f (gd).B.G | 
 g2 (bg) agfd | (ed).e.f g2 (ga) | (ba).g.f (gf).e.d | edef gd BG | (cB).c.d (ef).g.e | 
 dgBg AGFA |]  