#!/bin/bash
# take all the arguments and print in triangular order
# ./countdown a b c d e
# a b c d e
# b c d e
# c d e
# d e
# e                                                                                                                                                                              
# shift: $2 => $1, $3 => $2, $4 => $3

while [ $# -gt 0 ]
do
  echo "$@"
  shift
done

# Or with a for loop:
# for i in $(seq 1 $num)
# do
#   echo "$@"
#   shift
# done