Six leds lights up sequence and back by pressing buttonup/down 5 times.

Other Hardware LEDs and Multiplexing
6

Thank you both for your quick replies.

Calin Tamaian thank you for your shortcut but what MAS3 said is that I have to take it step by step.

MAS3 my brother is a programmer and helpt me a lot with the structure and it works now and understand nearly intirely:). My code at this moment is like this:

// constants won't change. They're used here to 
// set pin numbers:
const int upButtonPin = 8;     // the number of the pushbutton pin
const int downButtonPin =  9;
const int firstGearLed =   2; // 
const int secondGearLed =  3; // 
const int thirdGearLed =   4; // 
const int fourthGearLed =   5; // 
const int fifthGearLed =   6; // 
const int sixthGearLed =   7; // 

int gearNumber = 0;
int upButtonState = 0;
int downButtonState = 0;

void setup() {
  // initialize the LED pin as an output:
  pinMode(firstGearLed, OUTPUT);
  pinMode(secondGearLed, OUTPUT); 
  pinMode(thirdGearLed, OUTPUT);
  pinMode(fourthGearLed, OUTPUT); 
  pinMode(fifthGearLed, OUTPUT); 
  pinMode(sixthGearLed, OUTPUT); 

  // initialize the pushbutton pin as an input:
  pinMode(upButtonPin, INPUT);     
  pinMode(downButtonPin, INPUT); 
}

void loop(){
  // read the state of the pushbutton value:
  upButtonState = digitalRead(upButtonPin);
  downButtonState = digitalRead(downButtonPin);

  // check if the pushbutton is pressed.
  // if it is, the buttonState is HIGH:
  if (upButtonState == HIGH) {
    if ( (gearNumber >= 0) && gearNumber <= 6){
      gearNumber = gearNumber + 1;
      delay(500);
//      gearNumber = gearNumber + 1;

      switch(gearNumber){
       case 1: 
           digitalWrite(firstGearLed, HIGH);
           digitalWrite(secondGearLed, LOW);
           digitalWrite(thirdGearLed, LOW);
           digitalWrite(fourthGearLed, LOW);
           digitalWrite(fifthGearLed, LOW);
           digitalWrite(sixthGearLed, LOW);
         break;
         
       case 2:
           digitalWrite(firstGearLed, LOW);
           digitalWrite(secondGearLed, HIGH);
           digitalWrite(thirdGearLed, LOW);
           digitalWrite(fourthGearLed, LOW);
           digitalWrite(fifthGearLed, LOW);
           digitalWrite(sixthGearLed, LOW);
         break;
         
       case 3:
           digitalWrite(firstGearLed, LOW);
           digitalWrite(secondGearLed, LOW);
           digitalWrite(thirdGearLed, HIGH);
           digitalWrite(fourthGearLed, LOW);
           digitalWrite(fifthGearLed, LOW);
           digitalWrite(sixthGearLed, LOW);
         break;
         
       case 4:
           digitalWrite(firstGearLed, LOW);
           digitalWrite(secondGearLed, LOW);
           digitalWrite(thirdGearLed, LOW);
           digitalWrite(fourthGearLed, HIGH);
           digitalWrite(fifthGearLed, LOW);
           digitalWrite(sixthGearLed, LOW);
         break;
         
       case 5:
           digitalWrite(firstGearLed, LOW);
           digitalWrite(secondGearLed, LOW);
           digitalWrite(thirdGearLed, LOW);
           digitalWrite(fourthGearLed, LOW);
           digitalWrite(fifthGearLed, HIGH);
           digitalWrite(sixthGearLed, LOW);
         break;
         
       case 6:
           digitalWrite(firstGearLed, LOW);
           digitalWrite(secondGearLed, LOW);
           digitalWrite(thirdGearLed, LOW);
           digitalWrite(fourthGearLed, LOW);
           digitalWrite(fifthGearLed, LOW);
           digitalWrite(sixthGearLed, HIGH);
         break;
      }

    }
  }
  
  //DOWN SHIFT
  if (downButtonState == HIGH) {
    if (gearNumber >= 1){
      gearNumber = gearNumber - 1;
      delay(500);
//      gearNumber = gearNumber + 1;

      switch(gearNumber){
       case 6: 
           digitalWrite(firstGearLed, LOW);
           digitalWrite(secondGearLed, LOW);
           digitalWrite(thirdGearLed, LOW);
           digitalWrite(fourthGearLed, LOW);
           digitalWrite(fifthGearLed, LOW);
           digitalWrite(sixthGearLed, HIGH);
         break;
         
       case 5:
           digitalWrite(firstGearLed, LOW);
           digitalWrite(secondGearLed, LOW);
           digitalWrite(thirdGearLed, LOW);
           digitalWrite(fourthGearLed, LOW);
           digitalWrite(fifthGearLed, HIGH);
           digitalWrite(sixthGearLed, LOW);
         break;
         
       case 4:
           digitalWrite(firstGearLed, LOW);
           digitalWrite(secondGearLed, LOW);
           digitalWrite(thirdGearLed, LOW);
           digitalWrite(fourthGearLed, HIGH);
           digitalWrite(fifthGearLed, LOW);
           digitalWrite(sixthGearLed, LOW);
         break;
         
       case 3:
           digitalWrite(firstGearLed, LOW);
           digitalWrite(secondGearLed, LOW);
           digitalWrite(thirdGearLed, HIGH);
           digitalWrite(fourthGearLed, LOW);
           digitalWrite(fifthGearLed, LOW);
           digitalWrite(sixthGearLed, LOW);
         break;
         
       case 2:
           digitalWrite(firstGearLed, LOW);
           digitalWrite(secondGearLed, HIGH);
           digitalWrite(thirdGearLed, LOW);
           digitalWrite(fourthGearLed, LOW);
           digitalWrite(fifthGearLed, LOW);
           digitalWrite(sixthGearLed, LOW);
         break;
         
       case 1:
           digitalWrite(firstGearLed, HIGH);
           digitalWrite(secondGearLed, LOW);
           digitalWrite(thirdGearLed, LOW);
           digitalWrite(fourthGearLed, LOW);
           digitalWrite(fifthGearLed, LOW);
           digitalWrite(sixthGearLed, LOW);
         break;
      }
    }
  }

  
  
  
}

My next goal is to use the button press to turn a servo to a programmed state in 6 steps. I ll try first and comeback with the code I produced:)

Thank you again!