Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/8
Q:1/2=100
M:4/4
K:D
['dABF AA/A/', 'DD/D/D g fdaf egfe fdfa BB/B/ Bg']  
X:1
L:1/8
Q:1/2=100
M:4/4
K:D
 A | dABF AA/A/ AB | dABF EE/E/ Ee | dABF AA/A/ fe | dBAF DD/D/D :: g | fdaf egfe | fdfa BB/B/ Bg | 
 (fe)af dgfe | dBAF [DA][DA]/[DA]/ [DA] :|  