public void setup() {

    brek = new AudioSample[4][4];
    // load audio samples

    minim = new Minim(this);

    for (int i = 0; i < 4; i++) {
      println("break-beat-0" + (i + 1) + ".mp3");
      brek[i][0] = minim.loadSample("break-beat-0" + (i + 1) + ".mp3", 512);
      brek[i][1] = minim.loadSample("break-perc-0" + (i + 1) + ".mp3", 512);
      brek[i][2] = minim.loadSample("break-piano-0" + (i + 1) + ".mp3", 512);
      brek[i][3] = minim.loadSample("break-strings-0" + (i + 1) + ".mp3", 512);
    }

    size(cellSize * cols, cellSize * rows);

    //  bytes[0]=0;
    // bytes[1]=1;

    grid = new Cell[cols][rows];
    for (int i = 0; i < cols; i++) {
      for (int j = 0; j < rows; j++) {
        grid[i][j] = new Cell(i * cellSize, j * cellSize, cellSize, cellSize);
      }
    }
    println(Serial.list());

    String portName = Serial.list()[2];
    myPort = new Serial(this, portName, 9600);
  }
  public void draw() {
    background(0);

    for (int i = 0; i < cols; i++) {
      for (int j = 0; j < rows; j++) {

        if ((i & 1) == 0) {
          // even rows white
          grid[i][j].display(255);
        } else {
          // odd rows gray
          grid[i][j].display(220);
        }
      }
    }

    if (play == true) {
      int j;
      if (millis() - starttime < delaytime) {
        count_up = (millis() - starttime);
        count_down = delaytime - count_up;
        steptimer = floor(4 / (delaytime / count_up));
        fill(0);
        //        textSize(12);
        //        text(steptimer, mouseX, mouseY);
        for (j = 0; j < rows; j++) {
          grid[steptimer][j].display(120);
          if (grid[steptimer][j].active) {
            grid[steptimer][j].trigger(steptimer, j);
          }
        }

        switch (steptimer) {
          case 0:
            uno = PApplet.parseByte(unbinary("00010001"));
            due = PApplet.parseByte(unbinary("00010001"));
            break;
          case 1:
            uno = PApplet.parseByte(unbinary("00100010"));
            due = PApplet.parseByte(unbinary("00100010"));
            break;
          case 2:
            uno = PApplet.parseByte(unbinary("01000100"));
            due = PApplet.parseByte(unbinary("01000100"));
            break;
          case 3:
            uno = PApplet.parseByte(unbinary("10001000"));
            due = PApplet.parseByte(unbinary("10001000"));
            break;
        }
        print(binary(uno));
        println(binary(due));

        myPort.write(due);
        myPort.write(uno);
        myPort.write(',');
      } else {
        starttime = millis();
        j = 0;
      }

      for (int i = 0; i < cols; i++) {
        for (int k = 0; k < rows; k++) {

          if (grid[i][k].active) {
            // even rows white

            if ((i + 4 * k) < 8) {
              uno |= (1 << i + 4 * k);
            } else {
              due |= (1 << (i + 4 * k) - 8);
            }
          } else {
            // odd rows gray

            if ((i + 4 * k) < 8) {
              uno &= ~(1 << i + 4 * k); // chiedete a vanzati [email protected]
            } else {
              due &= ~(1 << (i + 4 * k) - 8);
            }
          }
        }
      }
    }

    // print(binary(uno));
    // print(binary(due));

    myPort.write(due);
    myPort.write(uno);
    myPort.write(',');

    println();
  }