int leds[6] = {13,12,11,10,9,8};
int button = 7;
void setup() {
// put your setup code here, to run once:
for(int i = 0; i < 6; i++){
pinMode(leds[i], OUTPUT);
}
pinMode(button, INPUT);
}
void loop() {
// put your main code here, to run repeatedly:
int i = 0;
while (i >= 0 && i < 6){
digitalWrite(leds[i], HIGH);
delay(500);
digitalWrite(leds[i], LOW);
i = (digitalRead(button) == HIGH) ? i - 1 : i + 1;
}
}