Result analysis
There are 3 sensors on the left, middle and right. When the black line is detected by a sensor, it will show high
level, or it is low.
When the sensor on left: high, middle: low, right: low, the car turns left lightly.
When the sensor on left: high, middle: high, right: low, the car turns left.
When the sensor on left: low, middle: high, right: low, the car moves forward straight.
When the sensor on left: low, middle: low, right: high, the car turns right lightly.
When the sensor on left: low, middle: high, right: high, the car turns right.