File organizer for large amount of images

organize.rb

#!/usr/bin/env ruby

require 'fileutils'

def createNewFolder
  picture_dir = ''
  loop do
    
    

    # Picture organizer for Misa
    animals = %w(lion tiger lama donkey lizard swordfish elephant rhyno)
    types = %w(flamboyant colorful gay obese albino quiet flammable treacherous)

    #do
    dir_name = "#{types.sample.capitalize}#{animals.sample.capitalize}_#{rand(10000)}"

    puts "I chose '#{dir_name}' for directory name."

    picture_dir = File.join(Dir.pwd,dir_name)
    break unless File.exists? File.join(picture_dir)
  end
  FileUtils.touch picture_dir
  picture_dir
end


def organizeFiles(path)
  # Loop all files and organize them into correct folders
  Dir.entries(path).each do |file|
    next if file == "." or file == ".."

    # Filename is like IMG_3483748.png
    # We want to order all with the prefix 'IMG'

    # Mysterious regex :O
    prefix = file.scan(/(^.*)_[0-9]+/i)
    unless prefix.empty?
      puts "prefix: #{prefix.first.first}"
      # Create directory if it doesn't exist
      FileUtils.mkdir File.join(path,prefix) unless File.directory? File.join(path,prefix)
      # Move original file
      FileUtils.mv File.join(path,file), File.join(path,prefix,file)
    end
  end
end

#1000.times do
#  createNewFolder
#end

organizeFiles(Dir.pwd)