Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/8
Q:1/2=90
M:4/4
K:C
['G2 G>G', 'd>cB>A B3 c e>dc>B B>dc>e d>cB>A d3']  
X:1
L:1/8
Q:1/2=90
M:4/4
K:C
 C |[K:G]"^53" B>c | d3 e d>cB>A | G2 G>G G>BA>c | (BG)(dB) e>dc>B | d3 B A2 (G/A/B/c/) | 
 d3 e d>cB>A | G2 G>G G2 A2 |"^1" (3(Bcd) (3(edc) B2 A2 | G2 G>G G2 :: A>A | A3 B d>cB>A | 
 B3 c e>dc>B | B>dc>e d>cB>A | d3 B A2 G>G | G3 B (BA)(cB) | B3 d (d^c)(ed) | 
 d>g"^1" (3(fge) (3(dec) (3(BcA) | G2 G>G G2 :|  