#define Tu 3
#define To 2
#define Lu 6
#define Lo 5
 
int z = 5;
int t = 0;
int s = 1;
 
void setup() {
  pinMode(Tu, INPUT_PULLUP);
  pinMode(To, INPUT_PULLUP);
  pinMode(Lu, OUTPUT);
  pinMode(Lo, OUTPUT);
}
 
void loop() {
  switch(s){

    case 0:
      digitalWrite(Lo, LOW);
      digitalWrite(Lu, LOW);

      if(digitalRead(Tu)==LOW){
        s = 2;
      }
      else if(digitalRead(To)==LOW){
        s = 4;
      }
    break;
 
    //Rollo oben wartet bis schließen
    case 1:
      digitalWrite(Lo, HIGH);
      //Tasterabfrage
      if(digitalRead(Tu)==LOW){
        digitalWrite(Lo, LOW);
        s = 2;
      }
    break;
 
    //Rollo im Betrieb kann durch taste gestoppt werden
    case 2:
     
      if((digitalRead(Tu)==LOW) || (digitalRead(To)==LOW)){
        t = 0;
        s = 0;
      }
      
      if(((t >= 0) && (t < 5)) && (z != 0)){
        digitalWrite(Lu, HIGH);
        t++;
      }
      else if(((t >= 5) && (t < 10)) && (z != 0)){
        digitalWrite(Lu, LOW);
        t++;
      }
      else if(t >= 10){
        z--;
        t = 0;
      }
      
      if(z == 0){
        s = 3;
      }
    break;
 
    //Rollo unten wartet bis öffnen
    case 3:
      digitalWrite(Lu, HIGH);
      
      if(digitalRead(To)==LOW){
        digitalWrite(Lu, LOW);
        s = 4;
      }
    break;
 
    //Rollo in betrieb kann gestoppt werden
    case 4:
    
      if((digitalRead(Tu)==LOW) || (digitalRead(To)==LOW)){
        t = 0;
        s = 0;
      }
    
      if(((t >= 0) && (t < 5)) && (z != 5)){
        digitalWrite(Lo, HIGH);
        t++;
      }
      else if(((t >= 5) && (t < 10)) && (z != 5)){
        digitalWrite(Lo, LOW);
        t++;
      }
      else if(t >= 10){
        z++;
        t = 0;
      }
      
      if(z == 5){
        s = 1;
      }
    break;
  }
  delay(100);
}