Minimal Ruby program for experimenting with truffle-ruby tooling

Foo.rb

class Foo
    def initialize()
        @val = 0
    end
    def go_up()
        @val+=1
    end
    def go_down()
        @val-=1
    end
end

foos = [Foo.new, Foo.new, Foo.new]

loop do
    foos.each do |x| 
        x.go_up() 
        x.go_down() 
    end
end