//--- MACRO DEFINITION              TRUE:FALSE
//                                    1 : 0
#define led1(x) digitalWrite(13, x? HIGH:LOW)
#define led2(x) digitalWrite(12, x? HIGH:LOW)
#define led3(x) digitalWrite(11, x? HIGH:LOW)
#define led4(x) digitalWrite(10, x? HIGH:LOW)

#define pb1     digitalRead(A1)
#define pb2     digitalRead(A2)
#define pb3     digitalRead(A3)

void setup() 
{ for(uint8_t i=10;i<=13;i++)
    pinMode(i,OUTPUT);

  pinMode(A1,INPUT_PULLUP);
  pinMode(A2,INPUT_PULLUP);
  pinMode(A3,INPUT_PULLUP);

  Serial.begin(9600);
}

void LEDs(uint8_t no) 
{ led1(no & 1<<0);
  led2(no & 1<<1);  
  led3(no & 1<<2);  
  led4(no & 1<<3);  
}

uint8_t getPB()
{ uint8_t x=0;

  if(pb1==0) x |= 1<<0; //-----> x=1
  if(pb2==0) x |= 1<<1; //-----> x=2
  if(pb3==0) x |= 1<<2; //-----> x=4

  return x; 
}

uint8_t a[10] = {1,3,7,15,14,12,8,0};
uint8_t b[10] = {8,12,14,15,7,3,1,0};
uint16_t masa=100;

void KananKiri()
{ //--- CASCADED LOOP
  for(uint8_t j=0;j<2;j++)
  {
    for(uint8_t i=0;i<8;i++)
    { LEDs(a[i]);
      delay(masa);
    }
    for(uint8_t i=0;i<8;i++)
    { LEDs(b[i]);
      delay(masa);
    }
  }
}

uint8_t cnt=0;
void loop() 
{ 
  uint8_t pbStatus = getPB();
  
  if(pbStatus==1)
  { cnt++;
    if(cnt==1) led1(1);
    if(cnt==2) led2(1);
    if(cnt==3) led3(1);
    if(cnt==4) led4(1);
    if(cnt==5) 
    { cnt=0;
      for(uint8_t i=10;i<=13;i++)
        digitalWrite(i,LOW);
    }
    
    Serial.println(cnt);
    delay(300);
  }
}


//--- DIGITAL OUTPUT
//--- MACRO DEFINITION
//--- MULTIPLE MACRO DEFINITION
//--- BITWISE OPERATION

//    0000 0001 --> 1

//  128 64  32  16  8421   
//    0000 0000 --> 8
//    0000 1000   

//    0000 0100 --> 1 << 2
//    0000 0010 --> 1 << 1
//    0000 1000 --> 1 << 3

//         8421   
//    0000 0100 --> 4 << 2
//    0001 0000 --> 4 << 2

//    0000 0100 --> 4 >> 1
//    0000 0010 --> 4 >> 1

//  x=0
//  (x & 1) = 0 & 1 ==> 0

//  x=1
//  (x & 1) = 1 & 1 ==> 1


//////////////// DIGITAL INPUT

//BOUNCING = 2 metal contact produces multiple signal
//LATCHING = 1 signal produced
//POSITIVE EDGE  || NEGATIVE EDGE