int p1=13;
int p2=12;
int p3=11;
int p4=10;
int start=10;
int pend=13;
int waiting = 1000;

void setup() {
  pinMode(p1, OUTPUT);
  pinMode(p2, OUTPUT);
  pinMode(p3, OUTPUT);
  pinMode(p4, OUTPUT);
  // put your setup code here, to run once:

}
void DisplayNum(int num){
  for(int digit=0;digit<4;digit++){
    int currentPin = start + digit;
    if(bitRead(num,digit)==1){
      digitalWrite(currentPin, HIGH);
    }else{
      digitalWrite(currentPin, LOW);
    }}
}
void loop() {
  // put your main code here, to run repeatedly:
for(int n = 0; n<16;n++){
  DisplayNum(n);
  delay(waiting);
}

}