Compose music that abides by the dictated structure and encompass the given theme
X:1
L:1/4
Q:1/4=180
M:2/2
K:Bb
['_g =g']  
X:1
L:1/4
Q:1/4=180
M:2/2
K:Bb
 d g _g =g | a b z b | c'/b/ a g a | _g =g z2 | d g _g =g | a b z b | c'/b/ a g a | _g =g z2 | 
 b/c'/ d' d' d' | z e'/d'/c'/b/ a | a/b/ c' c' c' | z d'/c'/b/a/ g | b a g a | _g =g z2 ||  