Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/16
M:2/2
K:G
['D2 G2D2 G2B2 d4 c2B2 A2D2 F2A2', 'D6 AB c2Bc A2dc B2AB G2cB A2GA']  
X:1
L:1/16
M:2/2
K:G
 D2 | G2D2 G2B2 d4 c2B2 | A2D2 F2A2 c6 d2 | B2>A2 (GA)(GA) (Bc)(Bc) d2B2 | 
 (cB)(AG) (AG)(FE) F6 A2 | (Bc)(BA) (GA)(GF) (EF)(ED) ^C2E2 | A2(GF) F2(ED) D6 :| AB | 
 c2Bc A2dc B2AB G2cB | A2GA F2BA G2FG E2AB | (cB)(AG) (AG)(FE) ^D4 B,4 | 
 (EF)(EF) G2E2 (FG)(FG) A2F2 | (GA)(GA) B2G2 (AB)(AB) c2A2 | B2(cB) (AG)(FE) E6 B2 | 
 (ed)c2 (dc)(Bd) (cB)A2 (BA)(GB) | A2F2 G2A2 F4 (DE)(FD) | G2(FG) (EF)(GE) A2(GA) (FG)(AF) | 
 B2(AB) (GA)(BG) c2(Bc) (AB)(cA) | d2(ed) (cB)(AG) G6 F2 | G4 G8 z2 |]  