flash.c

void matrix_scan_user(void) {
        if (flash && !flash_on_started && !flash_off_started) {
                flash_start_timer = timer_read();
                flash_on_started = true;
                set_color(underglow, false);
        } else if (flash && flash_on_started && !flash_off_started) {
                uint16_t flash_timer = timer_read();
                uint16_t elapsed = flash_timer - flash_start_timer;
                if (elapsed >= LED_FLASH_DELAY) {
                        flash_on_started = false;
                        flash_off_started = true;
                        rgblight_sethsv_eeprom_helper(0, 255, 0, false);
                        flash_start_timer = timer_read();
                }
        } else if (flash && flash_off_started && !flash_on_started) {
                uint16_t flash_timer = timer_read();
                uint16_t elapsed = flash_timer - flash_start_timer;
                if (elapsed >= LED_FLASH_DELAY) {
                        flash_off_started = false;
                        flash = false;
                        set_color(underglow, true);
                }
        }
}