int leddo=12;
int ledvang=8;
int ledxanh=7;
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
for(int i=0;i<30;i++)
{
digitalWrite(ledxanh, HIGH);
delay(500);
Serial.println("sang");
digitalWrite(ledxanh, LOW);
delay(500);
Serial.println("tat");
}
for(int i=0;i<3;i++)
{
digitalWrite(ledvang, HIGH);
delay(500);
Serial.println("sang");
digitalWrite(ledvang, LOW);
delay(500);
Serial.println("tat");
}
for(int i=0;i<30;i++)
{
digitalWrite(leddo, HIGH);
delay(500);
Serial.println("sang");
digitalWrite(leddo, LOW);
delay(500);
Serial.println("tat");
}

}