Utilize the alphabetic system of the specified musical pattern and the supplied melodic theme to create a piece of music.
X:1
L:1/8
M:4/4
K:A
['ecAB c2 Bc', "c'b agfa eccB AGAB c2 Bc efed"]  
X:1
L:1/8
M:4/4
K:A
 | ecAB c2 Bc | ecAB cBBc | ecAB c2 Bc | efed cAAc | ecAB c2 Bc | ecAB cBBc | ecAB c2 Bc | 
 efed cA A2 || fgaf b2 c'b | agfa eccB | AGAB c2 Bc | efed cA A2 | fgaf b2 c'b | agfa eccB | 
 AGAB c2 Bc | efed cAAc ||  