Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/4
M:4/4
K:F
['F E _E D C', '(D D)', 'C2 (F4']  
X:1
L:1/4
M:4/4
K:F
 F E _E ||"D7" D C A, (D | D) C2 A, | D C A, (D | D4) |"G7" D =B, G, (D | D) =B,2 G, | 
 D =B, G, (D | D3) ^D |"C7" E ^D E C | D E2 C | D C D (E | E) C D E |"F" F E F (D | 
 D) C A, (3C/4D/4E/4 | F E F (D |"F" D) C2"A7" A, ||"D7" D2 C A, | D C2 A, | D C A, (D | D4) | 
"Gm" G,2 G, A, |"D7" B, A, B, C |"Gm" D2 ^C (D |"Abdim" D) E F G |"F" A4 |"A7" A3 G |"Bb" F2 D2 | 
"F" C2 =B, C |"G7" D ^C D ^D |"C7" E2 C2 |"F" F2 E2 |"D7" D3 ^C |"G7" D ^C D ^D |"C7" E2 C2 | 
"F" (F4 | F) |]  