How to use the rhea-promise.delay function in rhea-promise

receiver.on(ReceiverEvents.message, (context: EventContext) => {
    console.log("Received message: %O", context.message);
  });
  receiver.on(ReceiverEvents.receiverError, (context: EventContext) => {
    const receiverError = context.receiver && context.receiver.error;
    if (receiverError) {
      console.log(
        ">>>>> [%s] An error occurred for receiver '%s': %O.",
        connectionContext.connection.id,
        receiverName,
        receiverError
      );
    }
  });
  // sleeping for 2 mins to let the receiver receive messages and then closing it.
  await delay(120000);
  await receiver.close();
  await connectionContext.connection.close();
}

receiver.on(ReceiverEvents.message, (context: EventContext) => {
    console.log("Received message: %O", context.message);
  });
  receiver.on(ReceiverEvents.receiverError, (context: EventContext) => {
    const receiverError = context.receiver && context.receiver.error;
    if (receiverError) {
      console.log(
        ">>>>> [%s] An error occurred for receiver '%s': %O.",
        connectionContext.connection.id,
        receiverName,
        receiverError
      );
    }
  });
  // sleeping for 2 mins to let the receiver receive messages and then closing it.
  await delay(120000);
  await receiver.close();
  await connectionContext.connection.close();
}

receiver.on(ReceiverEvents.message, (context: EventContext) => {
    console.log("Received message: %O", context.message);
  });
  receiver.on(ReceiverEvents.receiverError, (context: EventContext) => {
    const receiverError = context.receiver && context.receiver.error;
    if (receiverError) {
      console.log(
        ">>>>> [%s] An error occurred for receiver '%s': %O.",
        connectionContext.connection.id,
        receiverName,
        receiverError
      );
    }
  });
  // sleeping for 2 mins to let the receiver receive messages and then closing it.
  await delay(120000);
  await receiver.close();
  await connectionContext.connection.close();
}

console.log(`Received message: ${brokeredMessage.body} - ${brokeredMessage.label}`);
    await brokeredMessage.complete();
  };
  const onErrorHandler: OnError = (err) => {
    console.log("Error occurred: ", err);
  };

  console.log(`\nStarting receiver immediately at ${new Date(Date.now())}`);

  let receiver = queueClient.createReceiver(ReceiveMode.peekLock);
  receiver.registerMessageHandler(onMessageHandler, onErrorHandler);
  await delay(5000);
  await receiver.close();
  console.log(`Received ${numOfMessagesReceived} messages.`);

  await delay(5000);
  receiver = queueClient.createReceiver(ReceiveMode.peekLock);

  console.log(`\nStarting receiver at ${new Date(Date.now())}`);

  receiver.registerMessageHandler(onMessageHandler, onErrorHandler);
  await delay(5000);
  await receiver.close();
  console.log(`Received ${numOfMessagesReceived} messages.`);

  await queueClient.close();
}

console.log(`\nStarting receiver immediately at ${new Date(Date.now())}`);

  let receiver = queueClient.createReceiver(ReceiveMode.peekLock);
  receiver.registerMessageHandler(onMessageHandler, onErrorHandler);
  await delay(5000);
  await receiver.close();
  console.log(`Received ${numOfMessagesReceived} messages.`);

  await delay(5000);
  receiver = queueClient.createReceiver(ReceiveMode.peekLock);

  console.log(`\nStarting receiver at ${new Date(Date.now())}`);

  receiver.registerMessageHandler(onMessageHandler, onErrorHandler);
  await delay(5000);
  await receiver.close();
  console.log(`Received ${numOfMessagesReceived} messages.`);

  await queueClient.close();
}