With co-ordinates x y that are in Domieszka module I want to do ray r in
circle class. Are there some modules to serve co-ordinates or is there
the simplest way to do?

module Domieszka
   attr_accessor :x, :y

   def inspect
       "You are in: #{@x} #{@y}"
   end

   def moveto(x,y)
      @x = x
      @y = y
      return x,y
   end
end

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