Displaying chess board on the screen

Small Chess Board

#!/bin/bash
# SCRIPT  : smallchessboard.sh
# PURPOSE : Prints small chess board on the screen.

clear
for (( i=1 ; i<=8 ; i++ ))
do

  for (( j=1 ; j<=8 ; j++ ))
  do

    if [ `expr $(($i+$j)) % 2` -eq 0 ]
    then
        echo -e -n "\033[47m  "         # White background
    else
        echo -e -n "\033[40m  "         # Black background
    fi

  done
  echo                                  # move to next line

done

echo -e "\033[0m"                       # Restores color settings.


OUTPUT:


Big Chess Board

#!/bin/bash
# SCRIPT  : bigchessboard.sh
# PURPOSE : Prints big chess board on the screen.

clear
a=4

for (( i=1 ; i<=8; i++ ))
do

   for (( j=1 ;j<=2; j++ ))            # prints same line twice
   do
      tput cup $a 15                   # moves cursor to LINE COLUMN

     for (( k=1 ; k<=8; k++ ))
     do

        c=`expr $((i+k)) %  2`

        if [ $c -eq 0 ]
        then
             echo -e -n "\033[40m    "   # Black background
        else
             echo -e -n "\033[47m    "   # White background
        fi

      done
      let a=a+1

    done

done

echo -e "\033[0m"                         # Restores color settings
read key                                  # Waits for enter


OUTPUT: