Compose melodious music utilizing the prescribed letter representation and integrating the given thematic element.
X:1
L:1/8
M:4/4
K:D
['', 'ge e2 e2 af', 'cedB A2']  
X:1
L:1/8
M:4/4
K:D
 ef |: ge e2 e2 af | g2 eg fdef | ge e2 e2 af |1 gfgB A2 ef :|2 gfgB A2 AB || c3 d efec | 
 d3 c BA G2 | cAec a2 ed |1 cedB A2 AB :|2 cedB A2 ef ||  