Project 08 Digital Hourglass SOME LEDS NOT WORKING

Using Arduino Programming Questions
1

Hi,

Can you please tell me why my 2 last LED´s do not work? The circuit is right, i tested it with another code from the internet and it worked.

Thanks

const int switchPin = 8;
unsigned long previousTime = 0;
int switchState = 0;
int prevSwitchState = 1;
int led = 2;
int interval = 1000;
void setup() {
  Serial.begin(9600);
  for(int i = 2; i<6; i++) {
    pinMode(i, OUTPUT);
  }
  pinMode(switchPin, INPUT);
}

void loop() {
  unsigned long currentTime = millis();
  if(currentTime-previousTime>=interval){
    previousTime = currentTime;
    digitalWrite(led, HIGH);
    led++;
    if(led == 8){
      led = 2;
      previousTime = currentTime;
      for(int i = 2; i<6; i++){
        digitalWrite(i, LOW);
           led = 7;
      }
    }    
  }
  switchState = digitalRead(switchPin);
  if(switchState != prevSwitchState) {
    previousTime = currentTime;
    for(int i = 2;i<8;i++){
      digitalWrite(i, LOW);
    }
  }
  Serial.print(" previousTime: ");
  Serial.print(previousTime);
  Serial.print(" currentTime: ");
  Serial.print(currentTime);
  Serial.print(" switchState: ");
  Serial.print(switchState);
  Serial.print(" led: ");
  Serial.print(led);
  Serial.print(" prevSwitchState: ");
  Serial.println(prevSwitchState);
  delay(5);
}
2

Maybe because you don't set all the pins you are using as outputs?

  for(int i = 2; i<6; i++) {
    pinMode(i, OUTPUT);
  }

    for(int i = 2;i<8;i++){
      digitalWrite(i, LOW);
    }
3

and you are not setting all LED's LOW after setting them all HIGH.