#define potPin A0
int potData;
#define button 10
#define gnd1 2
#define gnd2 3
#define gnd3 4
#define gnd4 5
#define gnd5 6
#define row1 7
#define row2 8
#define row3 9
int fdelay = 50;
void setup() {
  // put your setup code here, to run once:
  pinMode(gnd1,OUTPUT);
  pinMode(gnd2,OUTPUT);
  pinMode(gnd3,OUTPUT);
  pinMode(gnd4,OUTPUT);
  pinMode(gnd5,OUTPUT);
  pinMode(row1,OUTPUT);
  pinMode(row2,OUTPUT);
  pinMode(row3,OUTPUT);
  pinMode(button,INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  fireSelect();
  idle();
  while(digitalRead(button)==HIGH){
    fire();
  }
}
void fireSelect(){
  potData=analogRead(potPin);
  if (potData<205) {
    onlyGnd1();
  }
  else if (205<potData && potData<410){
    onlyGnd2();
  }
  else if (410<potData && potData<615){
    onlyGnd3();
  }
  else if (615<potData && potData<820){
    onlyGnd4();
  }
  else if (820<potData){
    onlyGnd5();
  }
}

void fire(){
  digitalWrite(row3,LOW);
  digitalWrite(row1,HIGH);
  delay(fdelay);
  digitalWrite(row1,LOW);
  digitalWrite(row2,HIGH);
  delay(fdelay);
  digitalWrite(row2,LOW);
  digitalWrite(row3,HIGH);
  delay(fdelay);
}
void idle(){
  digitalWrite(row1,HIGH);
  digitalWrite(row2,LOW);
  digitalWrite(row3,LOW);
}
void allGndLow(){
  digitalWrite(gnd1,LOW);
  digitalWrite(gnd2,LOW);
  digitalWrite(gnd3,LOW);
  digitalWrite(gnd4,LOW);
  digitalWrite(gnd5,LOW);
}
void onlyGnd1(){
  digitalWrite(gnd1,LOW);
  digitalWrite(gnd2,HIGH);
  digitalWrite(gnd3,HIGH);
  digitalWrite(gnd4,HIGH);
  digitalWrite(gnd5,HIGH);
}
void onlyGnd2(){
  digitalWrite(gnd1,HIGH);
  digitalWrite(gnd2,LOW);
  digitalWrite(gnd3,HIGH);
  digitalWrite(gnd4,HIGH);
  digitalWrite(gnd5,HIGH);
}
void onlyGnd3(){
  digitalWrite(gnd1,HIGH);
  digitalWrite(gnd2,HIGH);
  digitalWrite(gnd3,LOW);
  digitalWrite(gnd4,HIGH);
  digitalWrite(gnd5,HIGH);
}
void onlyGnd4(){
  digitalWrite(gnd1,HIGH);
  digitalWrite(gnd2,HIGH);
  digitalWrite(gnd3,HIGH);
  digitalWrite(gnd4,LOW);
  digitalWrite(gnd5,HIGH);
}
void onlyGnd5(){
  digitalWrite(gnd1,HIGH);
  digitalWrite(gnd2,HIGH);
  digitalWrite(gnd3,HIGH);
  digitalWrite(gnd4,HIGH);
  digitalWrite(gnd5,LOW);
}