find error(s) in this bash script

error.sh

#!/bin/bash
MAX_NO=0
echo -n "Enter Number between (6 to 11) : "
read MAX_NO
if ! [ $MAX_NO -ge 6 -a $MAX_NO -le 11 ] ; then
   echo "You should give number between 6 and 11."
   exit 1
fi
clear
for (( i=1; i<=MAX_NO; i++ )) do     for (( s=MAX_NO; s>=i; s-- ))
    do
       echo -n " "
    done
    for (( j=1; j<=i;  j++ ))     do      echo -n " ."      done echo "" done ###### Second stage ######################
    for (( i=MAX_NO; i>=1; i-- ))
    do
    for (( s=i; s<=MAX_NO; s++ ))
    do
       echo -n " "
    done
    for (( j=1; j<=i;  j++ ))
    do
     echo -n " ."
    done
    echo ""
done