gistfile1.rb

# Ruby's World

# Runs this code
puts self # => main

# Runs this code
module ChangeMyWorld

  # The Worls is now changed
  
  # Runs this code
  puts self # => ChangeMyWorld
  
  # Runs this creation of a method
  def self.do_something
    # Doesn't run this code right now
    # => saves this stuff to do later
  end
  
end
# Exits the world

# Runs this code
puts self # => main

# Runs this code
ChangeMyWorld.do_something  # => Now runs the code saved as "do_something" in the world ChangeMyWorld