const int led[4]={13,12,11,10};
const int sw[3]={7,8,9};
void setup() {
  for(int x=0;x<5;x++){
    pinMode(led[x], OUTPUT);// four led output
  }
  for (int s=0;s<3;s++){
    pinMode(sw[s], INPUT_PULLUP);
  }
}
void loop() {
  if ( digitalRead(sw [0])==0){
    for(int z=0;z<5;z++){
      for (int a=0;a<5;a++){
        digitalWrite(led[a], LOW);
      }
      digitalWrite(led[z], HIGH);
      delay(500);
    }
  }else if (digitalRead(sw[1])==0){
    for(int r=3;r>-2;r--){
      for(int g=3;g>-2; g--){
        digitalWrite(led[g], LOW);
      }
      digitalWrite(led[r], HIGH);
      delay(500);
    }
  }else if (digitalRead(sw[2])==0){
    for (int l =0;l<5;l++){
      for(int p =0;p<4;p++){
        digitalWrite(led[p], LOW);
      }
      digitalWrite(led[(2*l)], HIGH);
      delay(500);
    }
  }

}