Compose a musical piece using the designated musical pattern's alphabetic representation and the assigned melodic theme.
X:1
L:1/8
M:6/8
K:D
['d2 D', 'd3 fed fed ged Bcd ece ece']  
X:1
L:1/8
M:6/8
K:D
 d2 D FGA | Bed cBc | d2 D ABc | Bec d3 | d2 D FGA | Bed cBc | daf ged/B/ | cec d3 || fed fed | 
 ged Bcd | ece ece | fag f2 e | d2 D FGA | Bed cBc | daf gdA | Bec d3 ||  