Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/8
Q:1/8=80
M:2/2
K:none
['e{g}f/>e/{gcd} c2 |{g}']  
X:1
L:1/8
Q:1/8=80
M:2/2
K:none
{g} A{d}B/>A/{g}G{d}A |{Gdc} d{e}A{GdG} f2 |{gfg} f{g}e/>f/{gf}ge |{gde} d/>c/{g}d/<e/{gfg}fA | 
{g} A{d}B/>A/{g}G{d}A |{Gdc} d{e}A{GdG} f2 |{gfg} f{g}e/>f/{gf}gc |{gef} ed{gdc} d2 :: 
{g} e{g}f/>e/{gcd}ce |{ag} ac{gef} e2 |{g} e{g}f/>e/{Gdc}d{e}B |{gfg} fe{gcd} c2 | 
{g} e{g}f/>e/{gcd}ce |{ag} ac{gef} e2 |{g} e{g}f/>e/{Gdc}dB |{gBd} B{e}A{GAG} A2 :: 
{g} A{GdG}c{gcd}ce |{gef} e{g}f/>e/{gcd} c2 |{g} e{g}f/>e/{Gdc}d{e}B |{gfg} fe{gcd} c2 | 
{g} A{GdG}c{gcd}ce |{gef} e{g}f/>e/{gcd} c2 |{g} e{g}f/>e/{Gdc}dB |{gBd} B{e}A{GAG} A2 :: 
{ag} af{gfg}fa |{ef} e{g}f/>e/{gcd} c2 |{g} e{g}f/>e/{Gdc}d{e}B |{gfg} fe{gcd} c2 |{ag} af{gfg}fa | 
{ef} e{g}f/>e/{gcd} c2 |{g} e{g}f/>e/{Gdc}dB |{gBd} B{e}A{GAG} A2 :|  