Type&TricK

void setup() {   // put your setup code here, to run once:   pinMode(8,OUTPUT);   pinMode(9,OUTPUT);   pinMode(10,OUTPUT);   pinMode(11,OUTPUT);   pinMode(6,OUTPUT);   pinMode(7,OUTPUT);   Serial.begin(9600); } void loop() {   int th=700;   int black=400;       int right=analogRead(A0);   int  centre=analogRead(A2);   int left=analogRead(A3); //Serial.println(right); //delay(500); //Serial.println(centre); //delay(500); //Serial.println(left); //delay(500); //Serial.println(A3);  if(right<=black && centre>=th && left<=black)  {   digitalWrite(9, HIGH);   digitalWrite(8, LOW);   analogWrite(6,80);     digitalWrite(10, HIGH);   digitalWrite(11, LOW);   analogWrite(7,80);  }  else if(right>=th && centre<=black && left<=black || right>=th && centre>=th && left<=black)  {     analogWrite(7,0);    digitalWrite(9, HIGH);    digitalWrite(8, LOW);    analogWrite(6,80);      }  else if (left>=th && centre<