//ACTIVIDAD3
int LED1=3;
int LED2=4;
int LED3=5;
int LED4=6;

void setup() {
pinMode(LED1,OUTPUT);
pinMode(LED2,OUTPUT);
pinMode(LED3,OUTPUT);
pinMode(LED4,OUTPUT);
}
void loop() 
{
digitalWrite(LED1,HIGH);
delay(500);
digitalWrite(LED2,HIGH);
delay(500);
digitalWrite(LED3,HIGH);
delay(500);
digitalWrite(LED4,HIGH);
delay(500);
digitalWrite(LED1,LOW);
digitalWrite(LED2,LOW);
digitalWrite(LED3,LOW);
digitalWrite(LED4,LOW);
delay(100);
}