int a=7;
int b=6;
void setup() {
  // put your set
  pinMode(a, OUTPUT);
  pinMode(b,OUTPUT);
  

}

void loop() {
  digitalWrite(7,1);
  delay(1000);
  digitalWrite(7,0);
  delay(500);
  digitalWrite(6,1);
  delay(2000);
  digitalWrite(6,0);
  delay(2500);
  // put your main code here, to run repeatedly:

}