Help with random numbers

Projects Programming
9

Got it all sorted, probably not the most efficient way but it works and I have even created a little countdown piezo and two buttons for different sequence times.

byte pins[] = {9,10,11,12, };
int pinCount = sizeof(pins) / sizeof(pins[0]);
int piezoPin = 8;

const byte pinButton = (2,4);

void(* resetFunc) (void) = 0;

void setup () {
  for (int i = 0; i < pinCount; i++) {
    pinMode(pins[i], OUTPUT) ; // setup all of the neccesary LED pins
  }
  pinMode(pinButton, INPUT) ; // setup the button pin
  Serial.begin(9600) ;  // setup the serial for debugging
  randomSeed(analogRead(A0)); // so you don't get the same sequence every time you run
}


void LightSequence() {
  int randomNum = random(pinCount) ; // pick random light to turn on.
  int pin = pins[randomNum];
  pins[randomNum] = pins[pinCount-1];
  pinCount--;
  Serial.println(randomNum); // print the chosen light in the serial
  digitalWrite(pin, HIGH) ; // turn on the randomly chosen light
  int randomTime = random(500, 3000) ; // pick a random amount of time to wait, the lowest being the minimum and the highest being the maxium
  Serial.println(randomTime); // print the chosen time in the serial
  delay(randomTime) ;  //wait the random time
  digitalWrite(pin, LOW) ; // turn off the light
}
void LightSequence2() {
  int randomNum = random(pinCount) ; // pick random light to turn on.
  int pin = pins[randomNum];
  pins[randomNum] = pins[pinCount-1];
  pinCount--;
  Serial.println(randomNum); // print the chosen light in the serial
  digitalWrite(pin, HIGH) ; // turn on the randomly chosen light
  int randomTime = random(50, 7500) ; // pick a random amount of time to wait, the lowest being the minimum and the highest being the maxium
  Serial.println(randomTime); // print the chosen time in the serial
  delay(randomTime) ;  //wait the random time
  digitalWrite(pin, LOW) ; // turn off the light
}

void LightDisplay() {
  LightSequence() ; // trigger a random light, and wait for it to turn off
  LightSequence() ; // trigger a random light, and wait for it to turn off
  LightSequence() ; // trigger a random light, and wait for it to turn off
  LightSequence() ; // trigger a random light, and wait for it to turn off
  Serial.println("End"); //print end in the serial to show when the sequence has ended
  
}

void LightDisplay2() {
  LightSequence2() ; // trigger a random light, and wait for it to turn off
  LightSequence2() ; // trigger a random light, and wait for it to turn off
  LightSequence2() ; // trigger a random light, and wait for it to turn off
  LightSequence2() ; // trigger a random light, and wait for it to turn off
  Serial.println("End"); //print end in the serial to show when the sequence has ended
}

void loop () {
  int button = digitalRead(2) ; //setup the button's value to be used
  if (button == HIGH) { //when the button is pressed
    delay (2000);
  tone(piezoPin, 100, 500);
  delay(1000);
  tone(piezoPin, 100, 500);
  delay(1000);
  tone(piezoPin, 100, 500);
  delay(1000);
  tone(piezoPin, 100, 500);
  delay(1000);
  tone(piezoPin, 1000, 2000);
  delay(3000);
    LightDisplay() ; //trigger the light sequence
    resetFunc();
  }
    int button4 = digitalRead(4) ; //setup the button's value to be used
  if (button4 == HIGH) { //when the button is pressed
    delay (2000);
  tone(piezoPin, 100, 500);
  delay(1000);
  tone(piezoPin, 100, 500);
  delay(1000);
  tone(piezoPin, 100, 500);
  delay(1000);
  tone(piezoPin, 100, 500);
  delay(1000);
  tone(piezoPin, 1000, 2000);
  delay(3000);
    LightDisplay2() ; //trigger the light sequence
    resetFunc();
  }
}