Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
M:2/2
K:C
['e2 c2', 'dB GB d2']  
X:1
L:1/8
M:2/2
K:C
 G,2 |{A,B,} C2 EG cBce | ag^fg e2 c2 | [BD]2 dB GB d2 | cdcB AGED | C2 EG cBce | ag^fg e2 c2 | 
 [BD]2 dB GB d2 |1 E2 [cE]2 [cE]2 :|2 c2 e2 c2 |: z2 | ag^fg ecBc | ag^fg e2 c2 | [BD]2 dB GB d2 | 
 cdcB AGED | C2 EG cBce | ag^fg e2 c2 | [DB]2 dB GB d2 | E2 [cE]2 [cE]2 :|  