Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/8
Q:1/4=110
M:2/4
K:F
['aa ab a3 b agfe', 'A2 FC B2']  
X:1
L:1/8
Q:1/4=110
M:2/4
K:F
 c/ | aa ab | a3 b | agfe | f/e/f/g/ | f>c | aa ab | a3 b | agfe | f3- f/ :: A2 FC | B2 GE | 
 c=B/c/ dg | f2 e2 | A2 FC | B2 GB | AGFE | F4 :|  