#define Sw0 A0
int Led[] = {A1,A2,A3,A4};
int i,oldstate,state;

void setup() {
  pinMode(Sw0, INPUT);
 for(int j = 0 ; j <  4 ; j++){
  pinMode(Led[j], OUTPUT);
 }
}

void loop() {
  oldstate = state;
  state = digitalRead(Sw0);
  digitalWrite(Led[0], i & (1 <<  0) ? HIGH : LOW);
  digitalWrite(Led[1], i & (1 <<  1) ? HIGH : LOW);
  digitalWrite(Led[2], i & (1 <<  2) ? HIGH : LOW);
  digitalWrite(Led[3], i & (1 <<  3) ? HIGH : LOW);
  if(state == 1 && oldstate == 0 ){
    i++;
    delay(100);
    if(i > 15){
      i = 0;
    }
  }
}