Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:4/4
K:D
['B3 c', 'dAFA dAFA']  
X:1
L:1/8
M:4/4
K:D
 B3 c dcde | f3 g fedc | B3 c dcBA | GFGA (3GAG F2 | B3 c dcde | f3 g fedc | fgfe dedc |1 
 Bbfd Bbfd :|2 B4 A2 Bc || dAFA dAFA | eAfA e2 (3ABc | dAFA dAFA | edef e3 c | dAFA dAFA | 
 eAfA e2 (3ABc | dcdf edBc | dfec d4 :|  