Compose a musical piece utilizing the given motif as the foundation while maintaining the required musical form.
X:1
L:1/8
M:4/4
K:Bmin
['fgfd fgfd', 'b2 bb b2 g2 b2 ag fdBd'  
X:1
L:1/8
M:4/4
K:Bmin
 Bcde fgfd | fgfd fgfd | e2 ge d2 fd | c2 c2 c2 dc | Bcde fgfd | fgfd fgfd | e2 ge d2 fd | 
 c2 c2 B4 :| b2 bb b2 g2 | b2 ag fdBd | e2 ge d2 fd | c2 c2 c4 | b2 bb b2 g2 | b2 ag fdBd | 
 e2 ge d2 fd | c2 c2 B4 :|  