int led1 =23;
int led2 =22; 
int led3 =21;
int led4 =19; 
int pulsador1 = 2;
int pulsador2 = 0;
int estado1;
int estado2;

void setup() {
pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT);
pinMode(led3, OUTPUT);
pinMode(led4, OUTPUT);
pinMode(pulsador1, INPUT);
pinMode(pulsador2, INPUT);
}

void loop() {
estado1=digitalRead(pulsador1);
estado2=digitalRead(pulsador2);

if(estado1 == LOW){
digitalWrite(led1, HIGH);
delay(100);
digitalWrite(led2, HIGH);
delay(100);
digitalWrite(led3, HIGH);
delay(100);
digitalWrite(led4, HIGH);
delay(100);
}
else{
digitalWrite(led1, LOW);
digitalWrite(led2, LOW);
digitalWrite(led3, LOW);
digitalWrite(led4, LOW);
}

if(estado2 == LOW){
digitalWrite(led4, HIGH);
delay(100);
digitalWrite(led3, HIGH);
delay(100);
digitalWrite(led2, HIGH);
delay(100);
digitalWrite(led1, HIGH);
delay(100);
}

else {
digitalWrite(led1, LOW);
digitalWrite(led2, LOW);
digitalWrite(led3, LOW);
digitalWrite(led4, LOW);
}

}