#!/bin/bash

PING="$1"

while :
do
    ping -c1 -W1 "$PING" >/dev/null 2>&1
    if [ $? = 0 ]
    then
        echo -e $'\e[30;42m'"[$PING] OK"
        sleep 1
    else
        echo -e $'\a\e[37;41m'"[$PING] NOK"
    fi
done