int Led1=13;
int Led2=12;
int Led3=11;
int Led4=10;
void setup()
{
pinMode(Led1,OUTPUT);
pinMode(Led2,OUTPUT);
pinMode(Led3,OUTPUT);
pinMode(Led4,OUTPUT);
}
void loop()
{
digitalWrite(Led1,HIGH);
delay(100);
digitalWrite(Led1,LOW);
delay(100);
digitalWrite(Led2,HIGH);
delay(100);
digitalWrite(Led2,LOW);
delay(100);
digitalWrite(Led3,HIGH);
delay(100);
digitalWrite(Led3,LOW);
delay(100);
digitalWrite(Led4,HIGH);
delay(100);
digitalWrite(Led4,LOW);
delay(100);
}