=>
looping: 0looping: 1looping: 2looping: 3looping: 4looping: 5looping: 6looping: 7looping: 8looping: 9done: 10
looping: 0
looping: 1
looping: 2
looping: 3
looping: 4
looping: 5
looping: 6
looping: 7
looping: 8
looping: 9
done: 10