Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
M:6/8
K:G
['D GG/A/B/c/ dBG ccc c/d/ec dBd e/f/ge', 'G2 D DGG G z D GG/A/B/c/']  
X:1
L:1/8
M:6/8
K:G
 D | GG/A/B/c/ dBG | ccc c/d/ec | dBd e/f/ge | f/g/af g2 d | gab abg | fge dcB | cAd BGd | 
 eee f2 d/d/ | g>gg gBd | gfg afd | eee e/f/ge | dB G G2 || D | DGG G z D | GG/A/B/c/ dBG | 
 EAA A z E | AA/B/c/d/ ecA | ddd dec | B>BB BB>A | G>GG G2 A | GFE DDD | DEF GB,D | GFG AFD | 
 d2 c B/c/dG | F/G/AD G2 |]  