Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/8
Q:1/4=100
M:3/4
K:F
['B A>G']  
X:1
L:1/8
Q:1/4=100
M:3/4
K:F
 c>c |"F" c3 A"C7" G>A |"F" F2 C2 E>F |"C" G3 B A>G |"F" A2 z2 c>c | c3 A"C7" G>A |"F" F2 C2 E>F | 
"C" G3 B"C7" A>G |"F" F2 z2 F>F |"Bb" d3 d d>d |"F" c2 A2 A>c |"C7" B3 B A>G |"F" A2 z2 F>F | 
"Bb" d3 d d>d |"F" c2 A2 A>c |"C7" B3 B A>G |"F" F4 |]  