bash-throbber.sh

#!/usr/bin/env bash

C="0" # count
while [ $C -lt 20 ]
do
  case "$(($C % 4))" in
    0) char="/"
        ;;
    1) char="-"
        ;;
    2) char="\\"
        ;;
    3) char="|"
       ;;
  esac  
  
  sleep .2
  echo -ne $char "\r"
  C=$[$C+1]
done
echo -e 'done\r'