read -p "Which wireless interface you will be using? e.g wlan0, wlan0mon etc": WLAN;
EXISTENCE_OF_WLAN=`airmon-ng|grep ''"$WLAN"|cut -f2`;
while [ -z "$WLAN" -o "$EXISTENCE_OF_WLAN" != "$WLAN" ]; do
echo -e "\e[31m\e[1mYou input a wireless interface that doesn't exist!\e[0m";