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:2/2
K:D
['dcdA B2', 'DFAG F2 A2', 'D A (dc).d.A B2 de |{g} f2']  
X:1
L:1/8
Q:1/2=90
M:2/2
K:D
 A | dcdA B2 AG | F2 ED CEEA | dcdA B2 AF | (!turn!EDEF) D/D/D D :: A | DFAG F2 A2 | DFAF E2 E2 | 
 DFAG F2 A2 | (!turn!EDEF) D/D/D D :: A | (dc).d.A B2 de |{g} f2 ed ceeg | 
{g} f2 !turn!ed (dB).A.F | (!turn!EDEF) D/D/D D :|  