Bash script to move files with no extension into folders

gistfile1.txt

#!/bin/bash
parent_path=$( cd "$(dirname "${BASH_SOURCE[0]}")" ; pwd -P )
FILES=${parent_path}/files/*
counter=0
for f in $FILES
do
  if [ -f "$f" ]; then
    file=${f##*/}
    if [[ ${file} != *"."* ]]; then
      if [[ "$counter" -lt 2499 ]]; then
         mv $f ${parent_path}/files/no-extension/batch_01/$file
         echo "$file" >> ${parent_path}/files/no-extension/no_extension_1.txt
      else 
         mv $f ${parent_path}/files/no-extension/batch_02/$file
         echo "$file" >> ${parent_path}/files/no-extension/no_extension_2.txt
      fi
        echo "$file moved"
        counter=$((counter+1))
    fi
  fi
done