Code line Follower untuk bootcamp

#include <AFMotor.h>

//defining pins and variables
#define left A0
#define right A1

//defining motors
AF_DCMotor M1(2);
AF_DCMotor M4(3);

int S_maju = 100;
int S_belok = 150;


void setup() {
  //declaring pin types
  pinMode(left, INPUT);
  pinMode(right, INPUT);
  //begin serial communication
  Serial.begin(9600);
}

void loop() {
  //printing values of the sensors to the serial monitor
  Serial.println(digitalRead(left));
  Serial.println(digitalRead(right));

  //line detected by both
  if (digitalRead(left) == 0 && digitalRead(right) == 0) {
    //Forward
    M1.run(FORWARD);
    M1.setSpeed(S_maju);
    M4.run(FORWARD);
    M4.setSpeed(S_maju);

  }
  //line detected by left sensor
  else if (digitalRead(left) == 0 && !analogRead(right) == 0) {
    //turn left
    M1.run(FORWARD);
    M1.setSpeed(S_belok);
    M4.run(BACKWARD);
    M4.setSpeed(S_belok);


  }
  //line detected by right sensor
  else if (!digitalRead(left) == 0 && digitalRead(right) == 0) {
    //turn right
    M1.run(BACKWARD);
    M1.setSpeed(S_belok);
    M4.run(FORWARD);
    M4.setSpeed(S_belok);


  }
  //line detected by none
  else if (!digitalRead(left) == 0 && !digitalRead(right) == 0) {
    //stop
    M1.run(RELEASE);
    M1.setSpeed(0);
    M4.run(RELEASE);
    M4.setSpeed(0);
  }
}