#include <Stepper.h> 


#define sensor 7
#define modeBtn 6
#define led1 5
#define led2 4
#define led3 3

int stepState = 0;
 
int modeState = 0;

int Rval = 50;

int stepsPerRevolution = 200;
Stepper Stepper(stepsPerRevolution, 8, 9, 10, 11);


void setup() {

  pinMode(sensor, INPUT_PULLUP);
  pinMode(modeBtn, INPUT_PULLUP);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);

  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);

Serial.begin(9600);

while(digitalRead(sensor)==HIGH){

  Stepper.setSpeed(20);
  Stepper.step(10);

 }


}



void loop() {

  

  int lecturaPot = analogRead(A2);
  int val = map(lecturaPot, 0, 1023, 0, 240);
  val = val + Rval;

  /*if (stepState >= stepsPerRevolution*2){
        val = 0;
        stepState = 0;
      }*/
  

  if(modeState==0){
      digitalWrite(led1, HIGH);
      digitalWrite(led2, HIGH);
      digitalWrite(led3, HIGH);
    }

  if(modeState==1){
      digitalWrite(led1, LOW);
      digitalWrite(led2, HIGH);
      digitalWrite(led3, HIGH);

      if (stepState == (stepsPerRevolution/10)){
        Rval = random(25, 240);
      }

    }

  if(modeState==2){
      digitalWrite(led1, HIGH);
      digitalWrite(led2, LOW);
      digitalWrite(led3, HIGH);
    }

  if(modeState==3){
      digitalWrite(led1, HIGH);
      digitalWrite(led2, HIGH);
      digitalWrite(led3, LOW);
    }

  
  


  if(digitalRead(modeBtn)==LOW){

    
    modeState ++ ;
    delay(250);

    


    if(modeState > 3){
      modeState = 0;
      
    }
  }

  





 if(val > 0){

  if (modeState == 0){
    Stepper.setSpeed(val);
  }

  if (modeState == 1){
    Stepper.setSpeed(Rval);
  }

  Stepper.step(10);
  stepState ++ ;

  if (stepState > stepsPerRevolution/10){
    stepState = 0;
  }

 }


Serial.println(stepState);


}