Construct a musical piece that contains the provided motif and abides by the prescribed alphabetical scheme.
X:1
L:1/4
M:3/4
K:none
['g a']  
X:1
L:1/4
M:3/4
K:none
[K:G]"D7" d3/2 c'/ b/c'/ | b3/2 a/ a |"G" d3/2 b/ a/b/ | a3/2 g/ g | g f e |"D7" e3/2 d/ d |1 
 d e f |"G" g3/2 a/ b :|2 d c' f |"G" g z z |:[K:C]"C" g a b | c'3/2 g/ e | c' b a | 
"G7" b3/2 g/ f | g a g | b3/2 g/ f |1 g a b |"C" c'3/2 d'/ e' :|2 g f' b |"C" c' z z |]  