Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/16
M:2/4
K:C
[".d4 dfac' .b4 z2 bb", 'AA.A2 GG.G2']  
X:1
L:1/16
M:2/4
K:C
"C" c2EG c2EG |"G" B2d2 !>!g4 | B2DG B2DG |"Am" A2c2 !>!e4 | a2ce a2ce |"G7" g2^ff =f2e2 | 
 d2B2 d2>G2 |"C" c2e2 c2 z2 ::[K:G]"D7" .d4 dfac' |"G" .b4 z2 bb |"D7" .a4 z2 aa |"G" g2f2 e2d2 | 
"D7" .d4 dfac' |"G" .b4 z2 bb |"D7" a2d'2 f2a2 |"G" g2g2 g2 z2 ::[K:C]"C" GG.G2 cc.c2 | 
"G7" BB.B2 B2D2 | FF.F2 AA.A2 |"C" GG.G2 G2E2 | ee.e2 gg.g2 |"G7" ff.f2 d2B2 |"Dm" AA.A2 F2D2 | 
"G7" AA.A2 !>!G4 |"C" GG.G2 cc.c2 |"G7" BB.B2 B2D2 | FF.F2 AA.A2 |"C" GG.G2 E2C2 | ee.e2 gg.g2 | 
"Dm" ff.f2 !>!d4 |"G7" B2DF AGFD |"C" C2c2 c2 z2 :|  