Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/8
Q:1/8=180
M:4/4
K:D
['d2 BA', 'ad d2']  
X:1
L:1/8
Q:1/8=180
M:4/4
K:D
 FABc d2 BA | dBBA FE E2 | FABc d2 BA | fgfe dBBA | FABc d2 BA | d2 BA FE E2 | FABc d2 BA | 
 fgfe dBB || e | ad d2 Adfb | adfa beef |"^11" ad d2 abaf | egfe dBBe | ad d2 Adfb | adfa beef | 
 g2 ge fefd | egfe dBBA ||  