#include <Arduino.h>

const int LED_Pins[5] = {8,9,10,11,12};
const int Button_Pin = 7;
unsigned long Start_Millis = 0;
unsigned long Current_Millis = 0;
unsigned long Blinkwartezeit = 1000;

uint8_t start = 0;
uint8_t step = 0;
uint8_t step_max = 5;

void handle_taster(void);
void handle_lauflicht(void);
void handle_timer(void);


void setup()
{
    Serial.begin(115200);
   pinMode(Button_Pin, INPUT_PULLUP);               // Button an Pin 7, als Eingang (Pullups) schalten
   pinMode(LED_Pins[0], OUTPUT);              // LEDs an den Pins 8-12 als Ausgang schalten
   pinMode(LED_Pins[1], OUTPUT);
   pinMode(LED_Pins[2], OUTPUT);
   pinMode(LED_Pins[3], OUTPUT);
   pinMode(LED_Pins[4], OUTPUT);
   Serial.println("Setup done.");
}


void loop() {
  // put your main code here, to run repeatedly:
  handle_taster();
  handle_timer();
  handle_lauflicht();
}

void handle_taster(){

    if(!digitalRead(Button_Pin)){
        start = start^1;              // toggled Varianble 
        Serial.print("start = ");Serial.println(start);
        if(start) step=0;
        Serial.println("Button erkannt");
        delay(500);                  // billiste Methode zum entprellen 
        
    }

}

void handle_lauflicht(){

    if(start){                                 // Start wird durch handle_taster() eingelesen
        if(step == 0){                         // Steps werden durch handle_timer() erhöht
            digitalWrite(LED_Pins[4], LOW);
            digitalWrite(LED_Pins[0], HIGH);
            Serial.println(step);    
        }
        else if(step == 1){
           digitalWrite(LED_Pins[0], LOW);
           digitalWrite(LED_Pins[1], HIGH); 
           Serial.println(step);             
        }
        else if(step == 2){
           digitalWrite(LED_Pins[1], LOW);
           digitalWrite(LED_Pins[2], HIGH); 
           Serial.println(step);             
        }
        else if(step == 3){
           digitalWrite(LED_Pins[2], LOW);
           digitalWrite(LED_Pins[3], HIGH);  
           Serial.println(step);            
        }
        else if(step == 4){
           digitalWrite(LED_Pins[3], LOW);
           digitalWrite(LED_Pins[4], HIGH);  
           Serial.println(step);            
        }
        else if(step == 5){
            for(int i=0; i<5; i++){
                digitalWrite(LED_Pins[i],LOW);
            }  
            Serial.println(step);            
        }
    }else{
        for(int i=0; i<5; i++){
            digitalWrite(LED_Pins[i],LOW);
        }
    }
}

void handle_timer(){

    if(start){
        if(millis()-Current_Millis >= Blinkwartezeit){
            step++;
            if(step > step_max) step=0;
            Current_Millis = millis();
        }
    }
}