Compose melodious music utilizing the prescribed letter representation and integrating the given thematic element.
X:1
L:1/8
Q:1/8=150
M:2/2
K:D
['dB BAFA D2 FA', 'd2 fg afdf a2 gf efga b2']  
X:1
L:1/8
Q:1/8=150
M:2/2
K:D
 dB | BAFA D2 FA | BA(3Bcd e2 de | fgaf egfe | dfed B2 dB | BAFA D2 FA | BA (3Bcd e2 de | 
 faaf egfe | d2 dd d2 :| fg | afdf a2 gf | efga b2 ag | fgaf egfe | dfed B2 dc | BAFA D2 FA | 
 BA (3Bcd e2 de | faaf egfe | d2 dd d2 :|  