int AA1=3;
int AA2=5;
int BB1=6;
int BB2=9;
int CC1=10;
int CC2=11;

int enable=2;
int emfA=A0;
int emfB=A1;
int emfC=A2;

int fase=1;

int IN=A3;
int tiempo=4000;


unsigned long previousMillis = 0; 

void setup() {
Serial.begin(250000);
  pinMode(AA1,OUTPUT);
  pinMode(AA2,OUTPUT);
  pinMode(BB1,OUTPUT);
  pinMode(BB2,OUTPUT);
  pinMode(CC1,OUTPUT);
  pinMode(CC2,OUTPUT);

  pinMode(enable,OUTPUT);

  pinMode(IN,INPUT);
  pinMode(emfA,INPUT);
  pinMode(emfB,INPUT);
  pinMode(emfC,INPUT);

  
  digitalWrite(enable,HIGH);
  previousMillis = micros();
  

  
  
}

void loop() {

  unsigned long currentMillis = micros();
  Serial.println(tiempo);
  
  
  if(currentMillis - previousMillis >= tiempo){
  
      previousMillis += tiempo;
   
  //Phase1 C-B
  switch(fase){
    case 1:
      digitalWrite(AA1,LOW);
      digitalWrite(AA2,LOW);
      digitalWrite(BB1,LOW);
      digitalWrite(CC2,LOW);
      digitalWrite(BB2,HIGH);
      digitalWrite(CC1,HIGH);
      break;

  //Phase2 A-B
    case 2:
      digitalWrite(AA2,LOW);
      digitalWrite(BB1,LOW);
      digitalWrite(CC1,LOW);
      digitalWrite(CC2,LOW);
      digitalWrite(AA1,HIGH);
      digitalWrite(BB2,HIGH);
      break;

  //Phase3 A-C
    case 3: 
      digitalWrite(AA2,LOW);
      digitalWrite(BB1,LOW);
      digitalWrite(BB2,LOW);
      digitalWrite(CC1,LOW);
      digitalWrite(CC2,HIGH);
      digitalWrite(AA1,HIGH);
    break;   
  
  //Phase4 B-C
  case 4:
      digitalWrite(AA1,LOW);
      digitalWrite(AA2,LOW);
      digitalWrite(BB2,LOW);
      digitalWrite(CC1,LOW);
      digitalWrite(BB1,HIGH);
      digitalWrite(CC2,HIGH);
      break;

  //Phase5 B-A 
  case 5:
      digitalWrite(AA1,LOW);
      digitalWrite(BB2,LOW);
      digitalWrite(CC1,LOW);
      digitalWrite(CC2,LOW);
      digitalWrite(AA2,HIGH);
      digitalWrite(BB1,HIGH);
      break;

  //Phase6 C-A
  case 6:
      digitalWrite(AA1,LOW);
      digitalWrite(BB1,LOW);
      digitalWrite(BB2,LOW);
      digitalWrite(CC2,LOW);
      digitalWrite(CC1,HIGH);
      digitalWrite(AA2,HIGH);
  break;}



  int t =analogRead(IN);
  tiempo=map(t,0,1024,1,1000);

  
  if (fase<6){
    fase=fase+1;}
  else{
    fase=1;
  } 
 }
}