int switchPin0 = 3;
int switchPin1 = 4;
int switchPin2 = 5;
int switchPin3 = 6;
int switchVar0 = 0;
int switchVar1 = 0;
int switchVar2 = 0;
int switchVar3 = 0;

int speakerPinL = 9;
int speakerPinR = 10;

int potPin1 = 1;
int potPin2 = 2;
int pot = 0;

int beat = 1;
int tone = 1;

void setup()                    // run once, when the sketch starts
{
  Serial.begin(9600);           // set up Serial library at 9600 bps
  pinMode(switchPin0, INPUT);    // sets the digital pin as input to read switch
  pinMode(switchPin1, INPUT);    // sets the digital pin as input to read switch
  pinMode(switchPin2, INPUT);    // sets the digital pin as input to read switch
  pinMode(switchPin3, INPUT);    // sets the digital pin as input to read switch
  pinMode(speakerPinL, OUTPUT);
  pinMode(speakerPinR, OUTPUT);
}

void loop()                     // run over and over again
{

  switchVar0 = digitalRead(switchPin0);
  switchVar1 = digitalRead(switchPin1);
  switchVar2 = digitalRead(switchPin2);
  switchVar3 = digitalRead(switchPin3);
  
  //delay(500);
  
  beat = analogRead(potPin1);
  beat = map(beat, 0, 1023, 0, 10);
  delay (beat);
  if (switchVar0 == 1){
    tone = analogRead(potPin2);  
    tone = map(tone, 0, 1023, 1, 10000);
    digitalWrite(speakerPinL, HIGH);
    digitalWrite(speakerPinR, HIGH);
    tone = random(1, tone);
    delayMicroseconds(tone);
    digitalWrite(speakerPinL, LOW);
    digitalWrite(speakerPinR, LOW);
    delayMicroseconds(tone);
  } 
  
  if (switchVar1 == 1){
    tone = analogRead(potPin2);  
    tone = map(tone, 0, 1023, 1, 10000);
    digitalWrite(speakerPinL, HIGH);
    digitalWrite(speakerPinR, HIGH);
    delayMicroseconds(tone);
    digitalWrite(speakerPinL, LOW);
    delayMicroseconds(tone + 1000);
    digitalWrite(speakerPinR, LOW);
  }  
  
  if (switchVar2 == 1){
     tone = analogRead(potPin2);
    digitalWrite(speakerPinL, HIGH);
    digitalWrite(speakerPinR, HIGH);
    tone = random(tone, tone+1000);
    delayMicroseconds(tone);
    digitalWrite(speakerPinL, LOW);
    digitalWrite(speakerPinR, LOW);
    delayMicroseconds(tone);
  } 
  
  if (switchVar3 == 1){
    tone = analogRead(potPin2);
    digitalWrite(speakerPinL, HIGH);
    digitalWrite(speakerPinR, HIGH);
    tone = random(100, 100+tone);
    delayMicroseconds(tone);
    digitalWrite(speakerPinL, LOW);
    digitalWrite(speakerPinR, LOW);
    delayMicroseconds(tone);
  } 
}