<code>
while true; do ping -c 10 8.8.8.8 | grep "packet loss"; sleep 1; done
</code>

Example:
<code>
biggi@box:~$ while true; do ping -c 10 8.8.8.8 | grep "packet loss"; sleep 1; done
10 packets transmitted, 10 received, 0% packet loss, time 9013ms
10 packets transmitted, 10 received, 0% packet loss, time 9010ms
10 packets transmitted, 10 received, 0% packet loss, time 9013ms
^C
biggi@box:~$
</code>