Compose a tune that integrates the letter-based representation of the determined musical pattern and the given melodic idea.
X:1
L:1/8
Q:1/4=180
M:4/4
K:Gmin
['cc c2 c2', 'B2 _d2 cc c2 c2 g_aga', 'f2 c2 cc', 'c2 c2']  
X:1
L:1/8
Q:1/4=180
M:4/4
K:Gmin
|:"^A" gzfz=ez_d z | c2 cc c2 c2 | _d2 BB B2 B2 | _d2 cc c2 c2 | gzfz=ez_d z | c2 cc c2 c2 | 
 _d2 BB B2 B2 | _d2 cc c2 c2 :|"^B" _d2 BB B2 B2 | _d2 cc c2 c2 |: g_aga g2 f2 | c2 cc c2 c2 | 
 _d2 BB B2 B2 | _d2 cc c2 c2 ::"^C" g_aga g2 f2 | c2 cc c2 c2 | Bc_dB d2 cB | c2 c2 c2 c2 | 
 g_aga g2 f2 | c2 cc c2 c2 | Bc_dB d2 cB | c2 c2 c2 c2 :|  