Just wrap the whole thing in a while (1) loop:

while (1) {
  while ( currenttime is between 11PM and 6AM ) {
    scan directory every hour
    send found files to other process
  }  
  
  while( currenttime is not between 11PM and 6AM ) {
    sleep # whatever process you have here
  }
}
[download]

Or am I reading this incorrectly?