Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/8
M:2/2
K:Amix
['a3 b', 'cB A2']  
X:1
L:1/8
M:2/2
K:Amix
 a3 b aa !slide!g2 | (e g3) [A,E]4 | a3 b ag e2 | cB A2 [A,E]4 | a3 b aa !slide!g3 | 
 (e g2) [A,E]4 | a3 b ag e2 | cB A2 [A,E]4 |: ABcB cB A2 | c2 BB A E3 | ABcA ff e2 | cB A2 [A,E]4 | 
 ABcB cB A2 | c2 BB A E3 | ABcA ff e2 | cB A2 [A,E]4 :|  