#define TRIG 26
#define ECHO 25

/*
int trig = 26;
int echo = 25;
int LOWLED = 18;
int MIDLED = 19;
int HIGHLED = 21;
int MOT
*/

#define LOWLED   18
#define MIDLED   19
#define HIGHLED  21
#define MOTOR    27

 unsigned int level = 0;
 
 void setup()
 { 

  pinMode(LOWLED,OUTPUT);
  pinMode(MIDLED,OUTPUT);
  pinMode(HIGHLED,OUTPUT);
  pinMode(MOTOR,OUTPUT);
  
  digitalWrite(LOWLED, HIGH);
  digitalWrite(MIDLED, HIGH);
  digitalWrite(HIGHLED, HIGH);
  digitalWrite(MOTOR, HIGH);

  Serial.begin(115200);
  pinMode(TRIG, OUTPUT);
  pinMode(ECHO, INPUT);
 }

void loop()
{
//start a new measurement:
digitalWrite(TRIG, HIGH);
delayMicroseconds(10);
digitalWrite(TRIG, LOW);

//Read te result:
int duration = pulseIn(ECHO,HIGH);
Serial.println(" ");
Serial.print("Distance in CM: ");
Serial.print(duration );


level = duration ;

if (t < 100)
{

       digitalWrite(LOWLED,LOW);
       digitalWrite(MIDLED,HIGH);
       digitalWrite(HIGHLED,HIGH);
       digitalWrite(MOTOR, HIGH);
       Serial.println(" - Water level is low: MOTOR ON ");


}
else if (    (level > 100)     &&     (level<300)     )   // 100 to 300
{
       digitalWrite(LOWLED,HIGH);
       digitalWrite(MIDLED,LOW);
       digitalWrite(HIGHLED,HIGH);
       digitalWrite(MOTOR, HIGH);
       Serial.println("  - Water level is middle: MOTOR ON ");


}
else if (level >= 300 )
{

       digitalWrite(LOWLED,HIGH);
       digitalWrite(MIDLED,HIGH);
       digitalWrite(HIGHLED,LOW);
       digitalWrite(MOTOR, LOW);
       Serial.println("  - Water level is FULL : MOTOR OFF ");

}
delay(1000);
}