#define RAQAM switch(a) {case 0: digitalWrite(2, HIGH); digitalWrite(3, HIGH); digitalWrite(4, HIGH); digitalWrite(5, HIGH); digitalWrite(6, HIGH); digitalWrite(7, HIGH); digitalWrite(8, LOW); break; case 1: digitalWrite(2, LOW); digitalWrite(3, HIGH); digitalWrite(4, HIGH); digitalWrite(5, LOW); digitalWrite(6, LOW); digitalWrite(7, LOW); digitalWrite(8, LOW); break; case 2: digitalWrite(2, 1); digitalWrite(3, 1); digitalWrite(4, 0); digitalWrite(5, 1); digitalWrite(6, 1); digitalWrite(7, 0); digitalWrite(8, 1); break; case 3: digitalWrite(2, 1); digitalWrite(3, 1); digitalWrite(4, 1); digitalWrite(5, 1); digitalWrite(6, 0); digitalWrite(7, 0); digitalWrite(8, 1); break; case 4: digitalWrite(2, 0); digitalWrite(3, 1); digitalWrite(4, 1); digitalWrite(5, 0); digitalWrite(6, 0); digitalWrite(7, 1); digitalWrite(8, 1); break; case 5: digitalWrite(2, 1); digitalWrite(3, 0); digitalWrite(4, 1); digitalWrite(5, 1); digitalWrite(6, 0); digitalWrite(7, 1); digitalWrite(8, 1); break; case 6: digitalWrite(2, 1); digitalWrite(3, 0); digitalWrite(4, 1); digitalWrite(5, 1); digitalWrite(6, 1); digitalWrite(7, 1); digitalWrite(8, 1); break; case 7: digitalWrite(2, 1); digitalWrite(3, 1); digitalWrite(4, 1); digitalWrite(5, 0); digitalWrite(6, 0); digitalWrite(7, 0); digitalWrite(8, 0); break; case 8: digitalWrite(2, 1); digitalWrite(3, 1); digitalWrite(4, 1); digitalWrite(5, 1); digitalWrite(6, 1); digitalWrite(7, 1); digitalWrite(8, 1); break; case 9: digitalWrite(2, 1); digitalWrite(3, 1); digitalWrite(4, 1); digitalWrite(5, 1); digitalWrite(6, 0); digitalWrite(7, 1); digitalWrite(8, 1); break; }

void setup() {
  Serial.begin(9600);
  Serial.println("salom");
for(int led = 2; led <= 8; led++)
    pinMode(led, OUTPUT);
}
void loop() {
  if(Serial.available()){
    int a = Serial.parseInt();
    RAQAM;
    Serial.println(a);
    if(a > 9) a = 0;
  }
}