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

void setup() {

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

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

}