Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/16
M:2/4
K:G
['', 'd2dB G2e2 d2dB dbba gddg aeeg a2ag', 'e2G2 Gceg']  
X:1
L:1/16
M:2/4
K:G
 dB |:"G" G2e2 d2dB | G2e2 d2dB | dbba gddg |"Am" aeeg a2ag |"D7" f2f2 f2ed | d2d2 d2dg | 
"G" b2db"D7" a2ca |1"G" g2g2 g2dB :|2"G" g2g2 g2d2 |:"D7" d2fa d2fa | a2f2 d2d2 | defg a2b2 | 
 c'6 d2 |"G" dbb2 g2fg |"Am" eaa2 e2ge |"G" dbgb"D7" afdf |1"G" g2b2 g2d2 :|2"G" g2b2 g2ge |] 
[K:C]"C" c2ge c2ae | e2e2 e2G2 | Gceg a2gc |"G7" Bcde f2gf | d2gf d2ag | f2f2 f2G2 | GBdf g2ba | 
"C" gecd e2ge | c2ge c2ag | e2e2 e2G2 | Gceg c'2c'2 |"F" c'ac'a f2fe |"G7" d2dg gbb2 | 
"C" c2ce eaa2 |"G7" gbba gfed |"C" c2c2 c2 z2 |]  