int ledk=1;
int ledm=2;
int ledh=3;

void setup(){

pinMode(ledk, OUTPUT);
pinMode(ledm,OUTPUT);
pinMode(ledh, OUTPUT);
}

void loop(){
  digitalWrite(ledk, HIGH);
  delay(1000);
  digitalWrite(ledk, LOW);
  digitalWrite(ledm, HIGH);
  delay(1000);
  digitalWrite(ledm, LOW);
  digitalWrite(ledh, HIGH);
  delay(1000);
  digitalWrite(ledh, LOW);


}