Catch me if you can

For String Quartet.
 
Every time I analyze a fugue, I always think that each voice is playing "Hide and Seek".
From this idea, I take part in the Korean traditional child folk song "꼭꼭 숨어라 (kkok-kkok sum-o-la)" for the subject theme. 
 
Click here to listen : YouTube
 
**Full score only, no parts included