Compose a musical piece in accordance with the outlined theme and structure.
X:1
L:1/8
Q:1/4=72
M:2/4
K:C
['Bdfa (a/g/) e2 g ga/g/ f/e/f/d/', 'e2 g ga/g/ f/e/f/d/'  
X:1
L:1/8
Q:1/4=72
M:2/4
K:C
 d/c/ | Bdfa | (a/g/) e2 g | ga/g/ f/e/f/d/ | c e2 c | Bdfa | (a/g/) e2 g | ga/g/ f/e/f/d/ | 
 ccc z |: fac'a | (g/f/) e2 g | ga/g/ f/e/f/d/ | c e2 c | eac'a | (a/g/) e2 g | ga/g/ f/e/f/d/ | 
 ccc z :|  