I have worked custom payment and i received the response from the payment i need to load the success page from my custom controller how can i do it. Whether i need to create own page or can i use core function to load success page in my custom controller is that possible please help me

public function execute()
{

    $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
    $order = $objectManager->create('\Magento\Sales\Model\Order') ->loadByIncrementId($orderId);
    $orderState = Order::STATE_PROCESSING;
    $order->setState($orderState)->setStatus(Order::STATE_PROCESSING);
    $order->save();
}