int photoTran = A1;
int reading = 0;
int forward=2;
int backward=3;
int motorspeed=0;


void setup(){
  pinMode(photoTran,INPUT);
  Serial.begin(9600);
  pinMode (backward, OUTPUT);
  pinMode (forward, OUTPUT);
}

void loop(){
  lcd.setCursor(0,0);
  reading = analogRead(photoTran);
  lcd.print(reading);
  lcd.print("  ");
  delay(100);
{
  if (reading<30){
    digitalWrite(backward,HIGH);
    digitalWrite(forward,LOW);
    motorspeed = map(reading, 30, 1023, 0, 255);
    analogWrite(backward,motorspeed);
  }
  else {
    digitalWrite(backward,LOW);
    digitalWrite(forward,HIGH);
    motorspeed = map(reading, 30, 400, 0, 255);
    analogWrite(forward,motorspeed);
  }
  }
}