Compose melodious music utilizing the prescribed letter representation and integrating the given thematic element.
X:1
L:1/4
M:3/4
K:none
['b a3/2 g/', "a g2 z c'3 e g3/2 a/"]  
X:1
L:1/4
M:3/4
K:none
[K:G]"G" B d d | e3/2 d/ d | d g a |"D7" g3/2 f/ f | c d d | e3/2 d/ d |1 d a b |"G" a3/2 g/ g :|2 
"D7" d f a |"G" g z z |:"C" e2 c' |"G" d2 b |"D7" a3/2 g/ f |"G" g b d |"C" e2 c' |"G" d2 b | 
"D7" a3/2 g/ f |"G" g z z :|[K:C]"C" e3 | e c a |"G7" g3 | f2 z | b z b | a z a |"C" g e a | g2 z | 
 c'3 | e g3/2 a/ |"Dm" g3 | f2 z |"G7" d a g | f e d |"C" (c3 | c) z z |]  