Compose a piece of music by integrating the assigned letter representation and provided tune.
X:1
L:1/8
Q:1/8=200
M:2/2
K:D
['dBAF DEFD']  
X:1
L:1/8
Q:1/8=200
M:2/2
K:D
"D" dBAF DEFD |"G" G3 A BG E2 |"D" dBAF DEFD |"G" GBAG"D" FD D2 ::"D" dcde f3 d |"A" efed cA A2 | 
"G" (3Bcd ef g2 ag |"A" faeg"D" fddA ::"G" BdAd BdAd | (3Bcd ef"A" gfed |"G" BdAd Bdag | 
"A" faeg"D" fd d2 :|  