act 4

int push1 = 0;
int push2 = 1;
int push3 = 2;
int leds[] = {3,4,5,6,7,8,9,10,11,12,13};
int i=0;
int currentled = 0;
int lastled = 11;
int add = 11;
int direction = 1;
int directionback = -1;
int y=12;
int z=0;

void setup() {
for(int x=0; x<11; x++){
  pinMode(leds[x], OUTPUT);
}
pinMode(push1, INPUT);
pinMode(push2, INPUT);
pinMode(push3, INPUT);
}

void loop() {
 digitalWrite(push1, HIGH);
 digitalWrite(push2, HIGH);
 digitalWrite(push3, HIGH);
if((digitalRead(push1) == LOW)&&(i==0)){i = 1;}
delay(50);
if((digitalRead(push1) == LOW)&&(i!=0)){i = 0;}
delay(50);
if((digitalRead(push3) == LOW)&&(i!=0)&&(i<12)){i++;}
if((digitalRead(push2) == LOW)&&(i!=0)&&(i>0)){i--;}
if(i == 6){sequence6();}
if(i == 5){sequence5();}
if(i == 4){sequence4();}
if(i == 3){sequence3();}
if(i == 2){sequence2();}
if(i == 1){sequence1();}
if(i == 0){sequence0();}
}

void sequence1(){
for(int x=0; x<11; x++){
  digitalWrite(leds[x], HIGH);
}
}

void sequence0(){
for(int x=0; x<11; x++){
  digitalWrite(leds[x], LOW);
}
}

void sequence2(){
for(int x=0; x<11; x++){
  digitalWrite(leds[x], LOW);
}
for(int x=0; x<11; x++){
  digitalWrite(leds[x], HIGH);
  delay(50);
}
}

void sequence3(){
for(int x=0; x<12; x++){
  digitalWrite(leds[x], LOW);
}
for(int x=0; x<11; x++){
  digitalWrite(leds[x], HIGH);
  delay(50);
  digitalWrite(leds[x], LOW);
  delay(50);
}
}

void sequence4(){
for(int x=0; x<=11; x++){
    digitalWrite(leds[x], LOW);
  }
  for(int x=0; x<12; x++){
    if(x % 2){
      digitalWrite(leds[x], HIGH);
    }
    else{digitalWrite(leds[x], LOW);
  }
  }
  delay(500);
for(int x=0; x<11; x++){
  if((x & 0x01) == 0){
      digitalWrite(leds[x], HIGH);
    }
    else{digitalWrite(leds[x], LOW);
  }
}
delay(500);
}

void sequence5(){
  for(int x=0; x<=12; x++){
    digitalWrite(leds[x], LOW);
  }
  for(int x=0; x<12; x++){
    if(x % 2){
      digitalWrite(leds[x], HIGH);
      delay(50);
    }
  }
for(int x=0; x<12; x++){
  if((x & 0x01) == 0){
      digitalWrite(leds[x], HIGH);
      delay(50);
    }
  }
  delay(50);
  for(int x=0; x<12; x++){
    if(x % 2){
      digitalWrite(leds[x], LOW);
      delay(50);
    }
  }
for(int x=0; x<12; x++){
  if((x & 0x01) == 0){
      digitalWrite(leds[x], LOW);
      delay(50);
    }
  }
}

void sequence6(){
int currentled = 0;
int lastled = 11;
  for(int x=0; x<=12; x++){
    digitalWrite(leds[x], LOW);
  }
   y = 11;
   z = 0;
  for(int x=0; x<11; x++){
    for(int currentled=0; currentled<y; currentled++){
    digitalWrite(leds[currentled], HIGH);
    delay(20);
    }
    y += directionback;

    for(int lastled=11; lastled>z; lastled--){
    digitalWrite(leds[lastled], LOW);
      delay(20);
    }
 if(lastled == 9){lastled -= direction;}
    }
}