function light_notification($call = true)
{
$lights = Light::allLights();
$pattern = $lights->isOn();
if ($call) {
$number = 2;
} else {
$number = 3;
}
for ($i = 0; $i < $number; $i++) {
$lights->on(true);
sleep(1);
$lights->on(false);
sleep(1);
}
$lights->status($pattern);
}