int sensor_read = 0;
int marks = 63;

int red = 26;
int yellow = 25;
int green = 33;
int blue = 27;
int purple = 32;


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
pinMode(4, OUTPUT);

pinMode(26,OUTPUT);
pinMode(27, OUTPUT);
pinMode(25,OUTPUT);
pinMode(33, OUTPUT);
pinMode(32, OUTPUT);
pinMode(14, OUTPUT);


digitalWrite(14,HIGH);
delay(10000);

}

void loop() {
 

sensor_read = analogRead(4);
Serial.print(sensor_read);
Serial.print("   ");
marks= map (sensor_read,0,4095,0,100);
Serial.println(marks);


digitalWrite(red ,LOW);
delay(10);
digitalWrite(yellow,LOW);
delay(10);
digitalWrite(green,LOW);
delay(10);
digitalWrite(blue,LOW);
delay(10);
digitalWrite(purple,LOW);
delay(10);


if (marks>90)
{

  Serial.println("A");

  digitalWrite(26, HIGH);
  digitalWrite(27, HIGH);
  digitalWrite(25, HIGH);
  digitalWrite(33, HIGH);
  digitalWrite(32, HIGH);

}

else if (marks > 75)

{
    Serial.println("B");

  digitalWrite(yellow, HIGH);
  digitalWrite(green, HIGH);
  digitalWrite(blue, HIGH);
  digitalWrite(purple, HIGH);

}


else if (marks > 65)

{
    Serial.println("C");

  digitalWrite(green, HIGH);
  digitalWrite(blue, HIGH);
  digitalWrite(purple, HIGH);

}


else if (marks > 40)

{
    Serial.println("E");

  digitalWrite(blue, HIGH);
  digitalWrite(purple, HIGH);

      Serial.println("Fail");

}

else 
{

      Serial.println("Fail");

   digitalWrite(purple, HIGH);


}
delay (500);

}