Remote Computer Stops Responding - Script Required to Initiate Restart

I work on a laptop at the office using Remote Desktop. Occasionally I can not longer reach the host. When I physically log on to the host it appears to have disconnected from the network, rebooting the host solves the problem. I need a script/program which runs on the remote host and reboots if it loses network connectivity.

Something like this...Not asking anyone to write it, just point me in the right direction if there are already apps or scripts which do this.

if flag file exists exit (we already restarted once)

loop
   loop
      ping 'some other host'
      if fail sleep and then try again
         if fail > N times
            write flag file
            reboot
         fi
      fi
    end loop
    sleep for a while
end loop