Utilize the alphabetic system of the specified musical pattern and the supplied melodic theme to create a piece of music.
X:1
L:1/8
M:3/4
K:E
['=GF E3 =D =GA B2 z A']  
X:1
L:1/8
M:3/4
K:E
 =G | =GF E3 =D | =GA B2 z A | =cB A3 F | =GF E2 z G | =GF E3 =D | =GA B2 z A | =cB A3 F | 
 =GF E2 z |]  