/*
const int LDR_PIN = A0;

void setup() {
  Serial.begin(9600);
}

void loop() {
  int ldr_value = analogRead(LDR_PIN);
  Serial.print("LDR value: ");
  Serial.println(ldr_value);
  delay(1000); // wait for 1 second before reading again
}
*/

int in1 = 3;
int in2 = 4;
int in3 = 2;
int in4 = 7;
int ena = 5;
int enb = 6;

void setup() {
  pinMode(in1, OUTPUT);
  pinMode(in2, OUTPUT);
  pinMode(in3, OUTPUT);
  pinMode(in4, OUTPUT);
  pinMode(ena, OUTPUT);
  pinMode(enb, OUTPUT);
}

void loop() {
  // right
  digitalWrite(in3, LOW);
  digitalWrite(in4, HIGH);
  analogWrite(enb, 255);

  delay(5000);
  
  // stop 1
  digitalWrite(in3, LOW);
  digitalWrite(in4, LOW);

  delay(3000);
  
  // left
  digitalWrite(in3, HIGH);
  digitalWrite(in4, LOW);
  analogWrite(enb, 255);

  delay(5000);

  // stop 2
  analogWrite(enb, 0);
  
  delay(3000);
  
}








void setSpeed(int ena_s, int enb_s) {
  analogWrite(ena, ena_s);
  analogWrite(enb, enb_s);
}

void goForward() {
  // left side motors
  digitalWrite(in1, HIGH);
  digitalWrite(in2, LOW);

  // right side motors
  digitalWrite(in3, HIGH);
  digitalWrite(in4, LOW);
}

void goBackward() 
{
  digitalWrite(in1, LOW);
  digitalWrite(in2, HIGH);
  digitalWrite(in3, LOW);
  digitalWrite(in4, HIGH);
}

void goRight()
{
  digitalWrite(in1, HIGH);
  digitalWrite(in2, LOW);
  digitalWrite(in3, LOW);
  digitalWrite(in4, HIGH);
}

void goLeft()
{
  digitalWrite(in1, LOW);
  digitalWrite(in2, HIGH);
  digitalWrite(in3, HIGH);
  digitalWrite(in4, LOW);
}

void stop()
{
  digitalWrite(in1, LOW);
  digitalWrite(in2, LOW);
  digitalWrite(in3, LOW);
  digitalWrite(in4, LOW);
}