Compose a tune that integrates the letter-based representation of the determined musical pattern and the given melodic idea.
X:1
L:1/8
M:4/4
K:C
['G,G, C2 CC C2 B,C D2 G,2']  
X:1
L:1/8
M:4/4
K:C
 G,G, | C2 CC C2 B,C | D2 G,2 G,2 G,G, | G,2 z G, F2 ED | D2 C2 z4 | C4 B,2 B,2 | A,4 z4 | 
 G,4 A,2 B,2 | C4 DCB,C | D2 DDEDCD | E4 DFED | C2 CCCB,A,B, | C4 z2 |]  