Can a Bourn Shell Script put itself in the background?

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=================
#!/bin/bash

# This script will sleep 
# 50 times for 1 second in
# the background


  main()
  {
    for ((i=0 ; i<=50 ;i++)) 
    do
      sleep 1
      let i++
    done
  }

  main &

# EOF
==================



-- 
Best regards,
Daniel