int T=500;
void setup() {
DDRD = 0xFF;

}

void loop() {
  // put your main code here, to run repeatedly:
PORTD = 0b00010000;//9
delay(T);
PORTD = 0b00000000;//8
delay(T);
PORTD = 0b01111000;//7
delay(T);
PORTD = 0b00000010;//6
delay(T);
PORTD = 0b00010010;//5
delay(T);
PORTD = 0b00011001;//4
delay(T);
PORTD = 0b00110000;//3
delay(T);
PORTD = 0b00100100;//2
delay(T);
PORTD = 0b01111001;//1
delay(T);
PORTD = 0b01000000;//0
delay(T);
}