Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
Q:1/4=90
M:6/8
K:F
['(GF) G']  
X:1
L:1/8
Q:1/4=90
M:6/8
K:F
 F | A2 G (GF) G | c3 A2 F | G2 G (GF) G | (A3 A2) F | A2 A (AG) A | c3 E2 F | G2 A (=BA) B | 
 (c3 c2) c | c2 c (ed) c | c3 A2 F | d2 F (GF) G | (A3 A2) G | F2 F (FG) F | d3 F2 G | 
 A2 A (GF) G | (F3 F2) z |]  