Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/8
Q:1/8=120
M:2/4
K:Ador
['agff g/f/e dd agff', 'dd ccBB AAdd ccBB AA']  
X:1
L:1/8
Q:1/8=120
M:2/4
K:Ador
 agff | g/f/e dd | agff | g/f/e dd :: ccBB | AAdd | ccBB | AA d2 :|  