Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/8
M:3/4
K:A
['B A']  
X:1
L:1/8
M:3/4
K:A
 E | c B G B A F | E2 A2 z E | A G A c B A | B4 z E | c B A d c B | c2 A2 D2 | F B A G F E | 
 A4 z4 | c B c d B | B A B c A F | F B A G F E | A4 z4 |]  