int time= 5;
int ledPin = 2;
int bomba = 9;
int sensor1 = 14;
int sensor2 = 15;
int gota = 2;
int pot=4; // el del medio
int val=10;
int pul1=17;
int pul2=18;
int pul3=19;
int val1=255;
int inc=20;
int flag1=0;
int flag2=0;
int flag3=0;
long temp_ini=0;
long temp_ini_ant;
long temp_ant=0;

void setup()                    // run once, when the sketch starts
{
  pinMode(ledPin, OUTPUT);      // sets the digital pin as output
  //pinMode(sensor1, INPUT);  
  //pinMode(sensor2, INPUT);  
  pinMode(pul1, INPUT);  
  //pinMode(pul2, INPUT);  
  pinMode(pul3, INPUT);  
  pinMode(13, OUTPUT); 
  pinMode(bomba, OUTPUT); 
  //digitalWrite(sensor1, HIGH); 
  //digitalWrite(sensor2, HIGH); 
  digitalWrite(pul1, HIGH); 
  //digitalWrite(pul2, HIGH); 
  digitalWrite(pul3, HIGH); 
  digitalWrite(13, HIGH); //Encendido
  //analogWrite(bomba, val); 
}

void loop()                     // run over and over again
{
  //if ((digitalRead(sensor1)==0)&&(digitalRead(sensor2)==1)) digitalWrite(bomba, HIGH); 
  //else if ((digitalRead(sensor1)==1)&&(digitalRead(sensor2)==0))  digitalWrite(bomba, LOW); 
  
  
  /*if (digitalRead(pul1)==0) analogWrite(bomba, 255); 
  if (digitalRead(pul2)==0) analogWrite(bomba, 200); 
  if (digitalRead(pul3)==0) analogWrite(bomba, 160);*/
  
  if ((digitalRead(pul1)==0)&&(flag1==0))
  {
    if ((val1+inc)>=255) val1=255;
    else val1=val1+inc; 
    flag1=1;
  }
  else if(digitalRead(pul1)==1) flag1=0;
  
  /*
  if ((digitalRead(pul2)==0)&&(flag2==0)) 
  {
    val1=150; 
    flag2=1;
  }
  else if(digitalRead(pul2)==1) flag2=0;
  */
  
  if ((digitalRead(pul3)==0)&&(flag3==0))
  {
    if (val1<=inc) val1=0;
    else val1=val1-inc; 
    flag3=1;
  }
  else if(digitalRead(pul3)==1) flag3=0;
  
  
  analogWrite(bomba, val1); 
  /*if (analogRead(gota)>800) digitalWrite(ledPin,HIGH);
  else digitalWrite(ledPin,LOW);*/
  
  /*
  if ((analogRead(1)>analogRead(0))&&((temp_ini-temp_ant) <= time))
  {
    //if ((temp_ini-millis())>(time-8)) digitalWrite(ledPin,HIGH);
    digitalWrite(ledPin,HIGH);
    temp_ini=millis();
  }
  else if (analogRead(1)<analogRead(0))
  {
    temp_ant=millis();
    digitalWrite(ledPin,LOW);
    temp_ini_ant = temp_ini;
  }
  else if ((temp_ini-temp_ant)>time) 
  {
    digitalWrite(ledPin,LOW);
   }
  */
  
   
  val=analogRead(pot);
  if(val<2)
    val = 2;
    
  digitalWrite(ledPin, HIGH); 
  delay(2);
  digitalWrite(ledPin, LOW); 
  delay(val); 
  /*  
  //temp_ini=millis();
  if (((temp_ini-temp_ant) <= pot))
  {
    digitalWrite(ledPin, HIGH);   // sets the LED on
    //temp_ant = temp_ini;
  }//delay(2);   // waits for a second
  else
  {
    digitalWrite(ledPin, LOW);    // sets the LED off
    temp_ant = temp_ini;
    temp_ini = millis();
  }*/
  //delay(val);                  // waits for a second*/
  
}