Repeat PopUp

How Do We Repeat PopUp
this is mah code

Code:

public function onCommand(CommandSender $sender, Command $command, $label, array $args) {
         if($sender instanceof Player) {
             $name = $sender->getName();
             switch (strtolower($command->getName())){
                 case 'random':
                 $sender->sendPopup(Color::GOLD."[CyberRandom]Good Day Sire $name");
                     return;
                     break;

Use a repeating Task