//  Press 2nd switch first glow 1st LED, delay,2nd LED,
//  delay, 5th LED, delay,6th LED
// Port description:
// Outport port : 6 pins from port D(lower bits) and 2 pin from port B(higher bits) of atmega 328p.
// Input port : 4 pins from port B(lower nibble) and 4 pins from port C (higher nibble)
void Delay();
void outport(char state);
void inport(char *state);
void glow_leds();

void setup() {
      
   glow_leds( );
}

void Delay(){
  volatile long i;
  for(i=0;i<300000;i++);
}

void outport(char state){
  volatile char* direcd = 0x2A;
  volatile char* outd = 0x2B;
  volatile char *direcb = 0x24;
  volatile char *outb = 0x25;
  *direcd = 0xFC;
  *outd = ((state & 0x3F) << 2);
  *direcb = 0xC3;
  *outb = ((state & 0xC0) >> 6);
}

void inport(char *state){
  volatile char* direcc = 0x27;
  volatile char *inc = 0x26;
  volatile char*direcb = 0x24;
  volatile char *inb = 0x23;
  *direcb = 0xC3;
  *direcc =0xF0;
  *state = (((*inc & 0x0F) << 4) | ((*inb & 0x3C)>>2));
}

void glow_leds( ){
  unsigned char input_Switch;
  int arr[] = {2,4,32,64};
  while(1){
    inport(&input_Switch);
    if(input_Switch == 0x04){
      for(short i=0;i<4;i++){
        outport(arr[i]);
        Delay();
      }  
      outport(0x00);
      Delay();
    }  
    else{
      outport(0x00);
       
    }
  }
}

void loop() {
  // put your main code here, to run repeatedly:

}