Edit Leonardo Bootloader. Stop blinking LED

Hi, I want to edit the Caterina Leonardo bootloader to stop the LED, connected to D13, from blinkng. Is It possible? Could someone elaborate please?

I suggest use Google to find some information. For example, I googled "Leonardo Bootloader LED 13" and the top hit was: https://forum.arduino.cc/index.php?topic=267125.0 You need to modify and compile the bootloader to make one that does not use the pin 13 or "L" LED.