Craft a musical piece that integrates the provided melodic theme and the corresponding alphabetical pattern.
X:1
L:1/8
M:3/4
K:G
['d3 edc B2 z']  
X:1
L:1/8
M:3/4
K:G
 GBc | d3 edc | B2 z ABc | d3 edc | B2 z BdB | A3 BcB | A2 z ddd | d3 BcA | G2 z |]  