Compose melodious music utilizing the prescribed letter representation and integrating the given thematic element.
X:1
L:1/8
M:4/4
K:D
['dBAF A2 FA', 'dB ABde fa a2 g2 fg ed']  
X:1
L:1/8
M:4/4
K:D
 dBAF A2 FA | dBAF E2 DF | dBAF A2 FA | ABBA B2 AB | dBAF A2 FA | dBAF E2 DF | dBAF A2 FA | 
 ABBA B2 dB || ABde fa a2 | g2 fg ed (3Bcd | ABde f2 ed | ABBA B2 dB | ABde fa a2 | 
 g2 fg ed (3Bcd | ABde f2 ed | ABBA B2 AB ||  