Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/8
M:4/4
K:D
['dBAB defe', 'fe dB (3BBB e2 e2']  
X:1
L:1/8
M:4/4
K:D
 dBAB defe | dBAB e2 e2 | dBAB defe | dcBc A2 A2 | dBAB defe | dB (3BBB e2 e2 | defg afef | 
 dcBc A2 A2 ||"^tr" f2 fe"^tr" f2 fe | dB (3BBB e2 e2 |"^tr" f2 fe defe | dcBc A2 A2 | 
"^tr" f2 fe"^tr" f2 fe | dB (3BBB e2 e2 | defg afef | dcBc A2 A2 ||  