const int sw=03,led1=13,led2=12,led3=11;
int i=0;
void setup() {
pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT);
pinMode(led3, OUTPUT);
pinMode(sw,INPUT_PULLUP);
}

void loop(){
  check_sw();
  if(i==1){
    digitalWrite(led1, HIGH);
  }else{digitalWrite(led1, LOW);}
  if(1==3){
    digitalWrite(led2, HIGH);
  }else{digitalWrite(led2, LOW);}
  if(i==3){
    digitalWrite(led3, HIGH);
  }else{digitalWrite(led3,LOW);}
}
 void check_sw(){
      if(digitalRead(sw)==LOW){
           delay(200);
           if(i<3){
             i++;
           }
           else{i=0;}
      }
 }