int GREEN = 13;
int Float = 2;

void setup() {
  Serial.begin(9600);
  pinMode(GREEN, OUTPUT);
  pinMode(Float, INPUT_PULLUP);
}
void loop() {
  Serial.print("digitalRead(");
  Serial.print( (Float == HIGH)  );
  Serial.print(")=");
  Serial.println(digitalRead (Float == HIGH) );
  delay(2000);
  
  if (digitalRead (Float == HIGH))
  {
    Serial.println("WATER LEVEL IS HIGH");
    digitalWrite(GREEN, HIGH);
  }

  Serial.print("digitalRead(");
  Serial.print( (Float == LOW)  );
  Serial.print(")=");
  Serial.println(digitalRead (Float == LOW) );
  delay(2000);
  
  if (digitalRead (Float == LOW))
  {
    Serial.println("WATER LEVEL IS LOW");
    digitalWrite(GREEN, LOW);
  }
}