int a = 1;
int b = 1;
void setup() {
  pinMode(13, INPUT_PULLUP);
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  // put your setup code here, to run once:
Serial.begin(9600);
}

void loop() {
if (digitalRead(13)==0){
 a++;
 
 
digitalWrite(a, HIGH);
delay(250);

}
if(a>=5&&digitalRead(13)==0){
b++;

  digitalWrite(b, LOW);
  delay(250);
}if(digitalRead(13)==0){
  
Serial.println(a);
Serial.println(b);}

if(b==5){
  a=1;

b=1;}
}