Running LED dan Button - Arduino

rangkailah rangkaian berikut

upload sketch berikut kearduino

int i,val;
int button1=8;
int button2=9;
unsigned char led[8]={~0x01, ~0x02, ~0x04, ~0x08, ~0x10, ~0x20, ~0x40, ~0x80};
unsigned char leda[8]={0b11111100, 0b11111001, 0b11110011, 0b11100111, 0b11001111, 0b10011111, 0b00111111, 0b01111111};
void ledplus()
{
  for(i=0;i<=7;i++)
            {
              if(digitalRead(button2)==LOW)
              {
                return;// delay(500);
              }
              PORTD=led[i];
              delay(300);            
            }
   
   PORTD=0xC3; delay(1000);
   
   for(i=7;i>=0;i--)
            {

              if(digitalRead(button2)==LOW)
              {
                return;//break; //delay(500);
              }
              PORTD=~led[i];
              delay(200);
            }   
  PORTD=0xFF;        
}

void ledmin()
{
  for(i=0;i<=7;i++)
            {
              if(digitalRead(button1)==LOW)
              {
                return;//break; //delay(500);
              }
              PORTD=leda[i];
              delay(300);
            }
            
   //PORTD=0xC3; delay(1000);             
            
   for(i=7;i>=0;i--)
            {
              if(digitalRead(button1)==LOW)
              {
                return;//break; //delay(500);
              }
              PORTD=~leda[i];
              delay(200);
            } 
  PORTD=0xFF; 
}


void setup() {
  // put your setup code here, to run once:
 
PORTD=0xFF;
DDRD=0xFF;
pinMode(button1,INPUT_PULLUP);
pinMode(button2,INPUT_PULLUP);
}

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

if(digitalRead(button1)==LOW){ledplus();}
else if(digitalRead(button2)==LOW){ledmin();}

            
}