int tekan=0;
void setup() {
  Serial.begin(9600);
  pinMode(9, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(10, INPUT);
  Serial.println("Reva Darmayanti XI TKJ 1");
}
void loop() {
  if(digitalRead(10)==HIGH){
  tekan=tekan+1;
  delay(1000);
  }
else if(tekan==3){
tekan=0;
}
  

if(tekan==1)
{
  digitalWrite(8, HIGH);
digitalWrite(9, LOW);
Serial.println(tekan);
}
else if(tekan==2)
{
  digitalWrite(8, LOW);
digitalWrite(9,HIGH);
Serial.println(tekan);
}
else if(tekan==3)
{
digitalWrite(9,LOW);
digitalWrite(8, LOW);
Serial.println(tekan);
}
}