int col[6]={18,5,17,16,4,0};
int row[4] {23,22,21,19};
int num_col[6] = {0,0,1,0,0,0};
int num_row[4] = {0,0,0,0};



void setup() {

  for(int i = 0; i<6; i++)
  {
    pinMode(col[i], OUTPUT);
  }
  //setting layers to output
  for(int i = 0; i<4; i++)
  {
    pinMode(row[i], OUTPUT);
  }
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  //turnEverythingOn();
  turnEverythingOff();
  //turnEverythingOn();
  One();
  

}

int rowcnt = 0;
void loop() {
  // put your main code here, to run repeatedly:
  
  digitalWrite(row[rowcnt], 0);
  delay(100); 
  //digitalWrite(row[rowcnt],1);
  //turnEverythingOff();
   delay(100); 
  if (rowcnt < 4)
  {
     
     rowcnt++;

  }
  else
  {

     rowcnt = 0;

  }

  // this speeds up the simulation
  

}

void turnEverythingOff()
 {
  // for(int i = 0; i<6; i++)
  // {
  //   digitalWrite(col[i], 0);
  // }
   for(int i = 0; i<4; i++)
   {
     digitalWrite(row[i], 1);
   }

 }
 
void turnEverythingOn()
{
  for(int i = 0; i<6; i++)
  {
    digitalWrite(col[i], 1);
  }
  //turning on layers
  for(int i = 0; i<4; i++)
  {
    digitalWrite(row[i], 0);
  }
}

void One()
{
  for(int i = 0; i<6; i++)
  {
    digitalWrite(col[i], num_col[i]);
  }
  //turning on layers
  /*
  for(int i = 0; i<4; i++)
  {
    digitalWrite(row[i], num_row[i]);
  }
*/
}