My buttons wont work

Hi, I need to make a clock for a project. The buttons on the clock have to come from a button class, which I have made. However, only the last button in my code is clickable. Everything works using the keyboard, but not the mouse. I hope you can help me, since none of my teachers are available for questions. Thanks!

**Main:**

boolean pressedLeft=false; //setting up boolean to know if the mouse is being clicked or not
boolean turnOnAlarm=false;
color buttoncolor;
Button but, but1, but2, but3, but4;
int alarmh=00;
int alarmm=00;
int alarms=00;

Minim minim; //minim audioplayer
AudioPlayer player;

void setup()
{
  size(600, 400);

  textAlign(CENTER, CENTER);
  textSize(72);
  minim = new Minim(this); //asking minim to use elements from the folder
  player = minim.loadFile("Old-fashioned-alarm-clock.mp3");

  buttoncolor = color(51, 153, 255);
  but = new Button(50, 330, 50, buttoncolor);
  but1 = new Button(160, 330, 50, buttoncolor);
  but2 = new Button(275, 330, 50, buttoncolor);
  but3 = new Button(390, 330, 50, buttoncolor);
  buttoncolor = color(255, 255, 51);
  but4 = new Button(50, 175, 50, buttoncolor);
}

void mousePressed()
{
  if (but.pressed())
  {
    if (turnOnAlarm==false)
    {turnOnAlarm=true;}
    else if (turnOnAlarm==true)
    {turnOnAlarm=false;}
  } else if (but1.pressed())
  {
    changeAlarmNumberH();
  } else if (but2.pressed())
  {
    changeAlarmNumberM();
  } else if (but3.pressed())
  {
    changeAlarmNumberS();
  } else if (but4.pressed())
  {
    turnOnLights();
  }
}
void keyPressed()
{
  if (keyCode==ENTER)
  {
    if (turnOnAlarm==false)
    {turnOnAlarm=true;}
    else if (turnOnAlarm==true)
    {turnOnAlarm=false;}
  } else if (keyCode==LEFT)
  {
    changeAlarmNumberH();
  } else if (keyCode==DOWN)
  {
    changeAlarmNumberM();
  } else if (keyCode==RIGHT)
  {
    changeAlarmNumberS();
  } else if (keyCode==UP)
  {
    turnOnLights();
  }
}

void changeAlarmNumberH()
{
  alarmh++;
  if (alarmh>23)
  {
    alarmh = 0;
  }
}
void changeAlarmNumberM()
{
  alarmm++;
  if (alarmm>60)
  {
    alarmm = 0;
  }
}
void changeAlarmNumberS()
{
  alarms++;
  if (alarms>60)
  {
    alarms = 0;
  }
}
void turnOnLights()
{
  if (millis() <= 5000) {
    background(255);
  } else {
    background(0);
  }
}

void draw() //drawing the clock
{
  background(0);

  String nowHour = nf(hour(), 2); //limits amount of digits
  String nowMinute = nf(minute(), 2);
  String nowSecond = nf(second(), 2);
  String alarmHour = nf(alarmh, 2);
  String alarmMinute = nf(alarmm, 2);
  String alarmSecond = nf(alarms, 2);

  fill(0, 129, 255);
  text(nowHour + ":" + nowMinute + ":" + nowSecond, (width*0.5), (height*0.3)); //running clock
  fill(51, 153, 255);
  text(alarmHour + ":" + alarmMinute + ":" + alarmSecond, (width*0.5), (height*0.7)); //alarm

  but.display();
  but1.display();
  but2.display();
  but3.display();
  but4.display();

  if (turnOnAlarm==true)
  {
    if (hour()==alarmh)
    {
      if (minute()==alarmm)
      {
        if (second()==alarms)
        {
          player.play();
          {
          }
        }
      }
    }
  }
}

**Button class:**

class Button
{
  int x, y;
  int size;
  color buttoncolor;
  boolean pressed = false;

  Button(int ix, int iy, int isize, color icolor)
  {
    x = ix;
    y = iy;
    size = isize;
    buttoncolor = icolor;
  }

  boolean pressed()
  {
    if (mouseX >= x && mouseX <= x+width &&
      mouseY >= y && mouseY <= y+height) {
      return true;
    } else {
      return false;
    }
  }

  void display()
  {
    fill(buttoncolor);
    rect(x, y, size, size);
  }
}