void setup() {
for (int i = 0; i < 7; i++ )
{
  pinMode(i, OUTPUT);
}
}

void loop() {
digitalWrite(0, LOW );
digitalWrite(1, LOW );
digitalWrite(2, LOW );
digitalWrite(3, HIGH );
digitalWrite(4, LOW );
digitalWrite(5, LOW );
digitalWrite(6, LOW );
delay(200);
//0
digitalWrite(0, LOW );
digitalWrite(1, LOW );
digitalWrite(2, LOW );
digitalWrite(3, LOW );
digitalWrite(4, HIGH );
digitalWrite(5, LOW );
digitalWrite(6, LOW );
delay(200);
//1
digitalWrite(0, LOW );
digitalWrite(1, LOW );
digitalWrite(2, LOW);
digitalWrite(3, LOW );
digitalWrite(4, LOW );
digitalWrite(5, HIGH );
digitalWrite(6, LOW);
delay(200);
//4
digitalWrite(0, HIGH );
digitalWrite(1, LOW );
digitalWrite(2, LOW );
digitalWrite(3, LOW );
digitalWrite(4, LOW );
digitalWrite(5, LOW );
digitalWrite(6, LOW );
delay(200);
//5
digitalWrite(0, LOW );
digitalWrite(1, HIGH );
digitalWrite(2, LOW );
digitalWrite(3, LOW );
digitalWrite(4, LOW );
digitalWrite(5, LOW );
digitalWrite(6, LOW );
delay(200);
//7
digitalWrite(0, LOW );
digitalWrite(1, LOW );
digitalWrite(2, HIGH );
digitalWrite(3, LOW );
digitalWrite(4, LOW );
digitalWrite(5, LOW );
digitalWrite(6, LOW );
delay(200);
}