new UART characteristic write for each new line in forEach loop

I am trying to send a new line of data over UART BLE for each iteration of the following command that is sent to the device;

\x15\x03\x10require('Storage').list().forEach(x=>Bluetooth.println(x)});\n\x10Bluetooth.println('END');\n

However, it gets concatenated together and sent as data in one write characteristic. I would like each iteration to be a separate (new) BLE write characteristic/notification. How could I do that so I get new data for each iteration of the loop?