class String

it is used to make the output more readable
String is an override to the main String class that is used to colorize the output

def colorize(color_code) 

def colorize(color_code)
  "\e[#{color_code}m#{self}\e[0m"
end

def green 

def green
  colorize(32)
end

def red 

def red
  colorize(31)
end

def yellow 

def yellow
  colorize(33)
end