/*  Fire laser 7 when you press button 11. 
 *  Fire laser 8 when you press button 12.
 *  Use the speaker to add a tone when the laser fires.
 */
 int i;
int hz;

void setup() {
  pinMode(2,OUTPUT); //speaker
  pinMode(7,OUTPUT); //blaster LED 7
  pinMode(8,OUTPUT); //blaster LED 8
 
  pinMode(11,INPUT_PULLUP); //button 11
  pinMode(12,INPUT_PULLUP); //button 12
}

void loop() {
  if(digitalRead(11)==LOW){ //if button 11 is pressed
    digitalWrite(7,HIGH); //turn on LED 7
    
    //A fast falling tone makes a better laser sound (like the laser 'bullet' is getting further away) than a single tone does. 
    // Whoop up
    for(int hz = 440; hz < 1000; hz++){
    tone(2, hz, 50);
    delay(5);
  }
  noTone(2);

  // Whoop down
  for(int hz = 1000; hz > 440; hz--){
    tone(2, hz, 50);
    delay(5);
  }
  noTone(2);
 
  }
  else if(digitalRead(12)==LOW){ //if button 12 is pressed
    digitalWrite(8,HIGH); // turn on LED 8
    
    // This tone falls from 1000 to 700, playing a different tone every 1 millsecond
    for (i = 912; i > 200; i--) {
        digitalWrite(2, HIGH);
        delayMicroseconds(i);
        digitalWrite(2, LOW);
        delayMicroseconds(i);
      }
    for (i = 200; i < 912; i++) {
      digitalWrite(2, HIGH);
      delayMicroseconds(i);
      digitalWrite(2, LOW);
      delayMicroseconds(i);
    }
    
  }
  else{ //Otherwise if no buttons are pressed
    digitalWrite(7,LOW); //turn off the LEDs
    digitalWrite(8,LOW);
    noTone(2); //stop the tone on the speaker
  }
}