Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:2/2
K:D
['d/d/d fd g2 fe ddfd eacA Ddfd', 'g2 dB']  
X:1
L:1/8
M:2/2
K:D
 d/d/d fd g2 fe | ddfd eacA | Ddfd gefd | egfa e2 cA :| (e/f/g) dB dgdB | gfgB AecA | g2 dB gefd | 
 egfa e2 cA | (e/f/g) dB BgdB | g2 dB AacA | g2 dB gefd | egfa eacA ||  