qmk_firmware/keyboards/crkbd/keymaps/ninjonas/rules.mk

RGBLIGHT_ENABLE = yes
MOUSEKEY_ENABLE = no
OLED_DRIVER_ENABLE = yes
LINK_TIME_OPTIMIZATION_ENABLE = yes

# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend

# If you want to change the display of OLED, you need to change here
SRC +=  ./lib/rgb_state_reader.c \
        rgb.c