Creating Incrementing Variables in Code with Ruby

I had a project I was working on that required me to assign values to incremental variables from an array.  A quick solution to the problem, using very little meta-coding is below in its most basic form.  One class was my data or value class.  It held the incremental variables I wanted to assign to.  Here It's called, "Foo".  The class that is using this data is "Bar".  Just for spice, I randomized the array values to assign to the data variables.

class Foo
    attr_accessor :i0, :i1, :i2, :i3

    initialize
        @i0 = 0; @i1 = 0; @i2 = 0; @i3 = 0
    end
end

class Bar
 attr_accessor :f

    def initialize
        @f = Foo.new
        @image_sort = %w{ 1 2 3 4 }.shuffle
    end

    def setup
        @image_sort.each_with_index do  | i, idx |
            @f.instance_variable_set( :"@i#{idx}", i )
        end

        puts @f.i0
        puts @f.i1
        puts @f.i2
        puts @f.i3
    end
end

g = Bar.new
g.setup