Compose a piece adhering to the given musical structure and theme.
X:1
L:1/4
Q:1/4=100
M:2/2
K:Ab
['(B F)']  
X:1
L:1/4
Q:1/4=100
M:2/2
K:Ab
 A | E F A B | c2 (B F) |{F} B z{F} B z |{F} B z z A | F F G A | (B F) D2 |{F} A z{F} A z | 
{F} A z z ||  