#!/bin/bash

for i in 1 2 3 4 5 6 7 8 9
  do
  for j in 1 2 3 4 5 6 7 8 9 0
    do
	(echo hi; rm -f dir1/file1) >>dir1/file1
	(echo lo; rm -f dir2/foo  ) >>dir2/foo
    done
done
