Compose a tune that integrates the letter-based representation of the determined musical pattern and the given melodic idea.
X:1
L:1/16
Q:1/4=90
M:2/4
K:C
['efdf ccde fgef ddef', "c2c2c2 GA d2ef egde eceg c'2c'2 bbaa"]  
X:1
L:1/16
Q:1/4=90
M:2/4
K:C
"_One flat in MS" gf | efdf ccde | fgef ddef | egag egag | fgee d2gf | efdf ccde | fgef ddef | 
 egfe dfed | c2c2c2 :: GA | d2ef egde | eceg c'2c'2 | bbaa ggff | egfe d2gf | efde ccde | 
 fgef ddef | egfe dfed | c2c2[c'c]2 :|  