Compose melodious music utilizing the prescribed letter representation and integrating the given thematic element.
X:1
L:1/8
M:2/4
K:Bb
["d2 g>^fg>f gbag ^f>df>d ^fagf g>^fg>f g/a/b/c'/", "bfbf bd'c'b TafTaf Tac'ba g>^fg>f g/a/b/a/ c'/b/a/g/"]  
X:1
L:1/8
M:2/4
K:Bb
 d2 | g>^fg>f | gbag | ^f>df>d | ^fagf | g>^fg>f | g/a/b/c'/ c'/b/a/g/ | ^fTad'f |{/^f} g2 z2 || 
 bfbf | bd'c'b | TafTaf | Tac'ba | g>^fg>f | g/a/b/a/ c'/b/a/g/ | ^fTad'f |{/^f} g2 z2 |]  