Linux/Unix Shell Scripting - script de tabla de multiplicación

#! /bin/bash

clear

let li=3;let co=3

for y in `seq 1 1 10`

do

for x in `seq 1 1 10`

do

 let c=${x}*${y}

tput cup ${li} ${co};echo "${y} * ${x}=${c} "

#echo "${y} * ${x}= ${c}"

if [ ${li} -lt 12 ]

then

  let li=${li}+1

else

  let li=3;let co=${co}+8

fi

done

done

tput cup 15 0