gistfile1.rb

threads = []
status=[]
30.times {|i| status[i]=false}
chars=['-', "\\", '|', '/', '-', "\\", '|', '/']
puts ''
inprocess=true
threads << Thread.new do
  while inprocess
    chars.each do |char|
      printf "\r"
      30.times do |i|
        printf status[i]==true ? '.' : char
	inprocess ||= status[i]
      end
      sleep 0.2
    end
  end
end

threads << Thread.new do
  while inprocess
    status[rand(30)]=true
    sleep 1
  end
end

threads.each {|t| t.join}