Print chessboard

#!/bin/sh
# Print chessboard --------------->> Method 1
# https://helloacm.com

for i in $(seq 1 8)
do
for j in $(seq 1 8)
do
S=$(((i+j)%2))
if [ $S -eq 0 ]
then
echo -n "\033[47m " # white
else
echo -n "\033[40m " # black
fi
done
echo -n "\033[40m" # black, ensure it exists normally
echo "" # new line
done

Echo "=============================================================="

# Print chessboad --------------->> Method 2

#! bin/bash

for (( i = 1; i <= 9; i++ )) ### Outer for loop ###
do
   for (( j = 1 ; j <= 9; j++ )) ### Inner for loop ###
   do
        tot=`expr $i + $j`
        tmp=`expr $tot % 2`
        if [ $tmp -eq 0 ]; then
            echo -e -n "\033[47m "
        else
            echo -e -n "\033[40m "
        fi
  done
 echo -e -n "\033[40m" #### set back background colour to black
 echo "" #### print the new line ###
done