fade.c

void buffer_fade(Color current_color, Color new_color) {
        uint16_t  difference = new_color.h - current_color.h;
        for (int i = 0; i <= difference; i++) {
                fade_buffer++;
        }
}

void fade_rgb (void) {
        switch(fade_state){
        case start:
                fade_timer_one = timer_read();
                fade_state = fade;
        case fade:
                fade_timer_two = timer_read();
                elapsed = fade_timer_two - fade_timer_one;
                if (elapsed < LED_FADE_DELAY) {return;}
                if (fade_buffer > 0) {
                        underglow.h = (underglow.h + 1)%359;
                        set_color(underglow, false);
                        fade_timer_one = fade_timer_two;
                        fade_buffer--;
                } else {
                        fade_state = stop;
                }
                return;

        case stop:
                return;
        }

}