/*
 * Shift Register helper function
 * shifts one array around one bit and appends value
 */
void shiftRegister(uint8_t *array, uint8_t value) {
	int len = (WIDTH * HEIGHT / 8) - 1;
	for(int i = 0; i < len; i++) {
		array[i] = (array[i] >> 1) | ((array[i+1] & 1) << 7);
	}
	array[len] = (array[len] >> 1) | (value > 0 ? 1 << 7: 0);
}