// **********************************************************
// *                                                        *
// * NAME        : Mirza Shahriar                           *
// * Program Name: lightchasers.ino                         *  
// * Date        : 2023-02-21                               *
// * Desc        : Our first program to                     *
// *               turn on led lights in multiple           *   
// *               patterns and play a tone.                *
// *                                                        *
// **********************************************************

int buttonPin           = 6;                        // the pin for the button
int speakerPin          = 7;                        // the pin for the speaker
int patternNumber       = 0;                        // tracks what pattern I'm on
int delayTime           = 100;                      // delay in ms between pattern steps
int patternStep         = 0;                        // variable to track current pattern step
int patternArray [6][3] = { {4,12,32} , {24,20,12} , {16,8,4} , {16,24,32} , {12,20,24} , {4,8,16} };  // array with all 6 patterns for LEDs in demcimal

void setup() {
  DDRB = B111111;                                   // set all PORTB pins as outputs
  pinMode(buttonPin, INPUT_PULLUP);                 // config button to be an INPUT
  pinMode(speakerPin, OUTPUT);                      // config speaker to be an OUTPUT
} // end setup()

void loop() {
  if (digitalRead(buttonPin) == LOW ){              // check if the button is pressed
    patternNumber = patternNumber + 1;              // go to the next pattern

    if (patternNumber == 7){                        // check if the patter number goes to 7      
      patternNumber = 1;                            // reset the patter to pattern 1
    } // end if  
   
    tone (speakerPin,500,100);                      // play the tone
    delay (110);                                    // amount of time to let go of the button
  } // end if

  PORTB = patternArray[patternNumber][patternStep]; // set the patter of the LED lights using the array
  delay(delayTime);                                 // delay for the pattern to keep running
  patternStep++;                                    // change the pattern to the next step

  if(patternStep == 3){                             // check to see if the pattern is on step 3
    patternStep = 0;                                // reset pattern
  }
} // end loop