global

def instantiate_all
  @enter = []
  @leave = []
  1.upto(9) {|i|
    Thread.new {
      begin
        Thread.current[:i] = i
        __sleep
        instance
      rescue RuntimeError => mes
        puts mes
      end
    }
  }
  puts "Before there were #{num_of_instances(self)}"
  sleep 3
  puts "Now there is #{num_of_instances(self)}"
  puts "#{@enter.join '; '} was the order of threads entering the waiting loop"
  puts "#{@leave.join '; '} was the order of threads leaving the waiting loop"
end