int valin = 0;
int valac = A0;

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

void loop() {
  valin = analogRead(valac);
  
  if (valin <= 100) {
    Serial.println("Empty");
  }
  else if (valin > 100 && valin <= 250) {
    Serial.println("Few water");
  }
  else if (valin > 250 && valin <= 300) {
    Serial.println("Good water level");
  }
  else { 
    Serial.println("Full");
  }
  delay(5000);
}