int led=7;
int led2=8;
int led3=3;

void setup() {
// put your setup code here, to run once:
pinMode(led,OUTPUT);
pinMode(led2,OUTPUT);
pinMode(led3,OUTPUT);
}
void loop() {
// put your main code here, to run repeatedly:
digitalWrite(led,HIGH);
digitalWrite(led2,HIGH);
digitalWrite(led3,HIGH);
delay(200);
digitalWrite(led,LOW);
digitalWrite(led2,LOW);
digitalWrite(led3,LOW);
delay(200);
}