void button() {
	volatile uint8_t button = 0, oldButton = 1;
	volatile uint8_t toggle = 1;
	while(1) {
		button = (PINB & 128) >> 7;

		if (oldButton == 1 && button == 0) {
		   toggle ^= 1;
		}

		oldButton = button;

		LCDDR0 &= ~(1<<6 | 1 << 1);
		LCDDR0  = LCDDR0 | (1 << ((toggle) ? 6:1));
	}
}