#define led1 8
#define led2 9 
#define led3 10
#define led4 11
#define led5 12
#define led6 13
#define tombol1 2
#define tombol2 3
#define tombol3 4
#define tombol4 5
void setup() { 
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT); 
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  pinMode(led5, OUTPUT);
  pinMode(led6, OUTPUT);
  pinMode(tombol1, INPUT_PULLUP);
  pinMode(tombol2, INPUT_PULLUP);
  pinMode(tombol3, INPUT_PULLUP);
  pinMode(tombol4, INPUT_PULLUP);
}
void loop()  {
if(digitalRead (tombol1)==LOW) { 
   digitalWrite (led4,HIGH);
   digitalWrite (led5,LOW);
   digitalWrite (led6,LOW);
   delay(200);
   digitalWrite (led4,LOW);
   digitalWrite (led5,HIGH);
   digitalWrite (led6,LOW);
   delay(200);
   digitalWrite (led4,LOW);
   digitalWrite (led5,LOW);
   digitalWrite (led6,HIGH);
   delay(200);
}
else if(digitalRead(tombol2)==LOW) {
  digitalWrite (led1,LOW);
  digitalWrite (led2,LOW);
  digitalWrite(led3, HIGH);
  delay(200);
  digitalWrite (led1,LOW);
  digitalWrite (led2,HIGH);
  digitalWrite(led3, LOW);
  delay(200);
  digitalWrite (led1,HIGH);
  digitalWrite (led2,LOW);
  digitalWrite(led3, LOW);
  delay(200);
}
else if (digitalRead(tombol3)==LOW){
  digitalWrite (led1,LOW);
  digitalWrite (led2,LOW);
  digitalWrite (led3,HIGH);
  digitalWrite (led4,HIGH);
  digitalWrite (led5,LOW);
  digitalWrite (led6,LOW);
  delay(200);
  digitalWrite (led1,LOW);
  digitalWrite (led2,HIGH);
  digitalWrite (led3,LOW);
  digitalWrite (led4,LOW);
  digitalWrite (led5,HIGH);
  digitalWrite (led6,LOW);
  delay(200);
  digitalWrite (led1,HIGH);
  digitalWrite (led2,LOW);
  digitalWrite (led3,LOW);
  digitalWrite (led4,LOW);
  digitalWrite (led5,LOW);
  digitalWrite (led6,HIGH);
  delay(200);
}
else if (digitalRead(tombol4)==LOW){
  digitalWrite (led1,HIGH);
  digitalWrite (led2,LOW);
  digitalWrite (led3,LOW);
  digitalWrite (led4,LOW);
  digitalWrite (led5,LOW);
  digitalWrite (led6,HIGH);
}
else { 
  digitalWrite (led1, LOW);
  digitalWrite (led2, LOW);
  digitalWrite (led3, LOW);
  digitalWrite (led4, LOW);
  digitalWrite (led5, LOW);
  digitalWrite (led6, LOW);
 }
}