I'm new to processing and I'm trying to make it so the square that is drawn will rotate when a button is pressed. I'm familiar with rotate() and translate(), I'm just unsure where to place the functions. I already have it so that when a button is pressed the square will either move horizontally or vertically or change shape or color. I even added mouse functions to drag the square and change the color randomly. The following is my code. Can anybody help?

int x = 300;
int y = 300;
int s = 50;
int boxcolor = color(0, 0, 255);



void setup()
{
  size(600, 600);
  background(255);
  smooth(0);
  rectMode(CENTER);
  noStroke();
}


void draw()
{
  noStroke();
  background(255);
  fill(boxcolor);
  rect(x, y, s, s);
 
  
  if (s <= 0)
  {
    stroke(255);
  }
  if (mousePressed && mouseButton == LEFT)
  {
    x = mouseX;
    y = mouseY;
  }
  if (mousePressed && mouseButton == RIGHT)
  {
    boxcolor = color(random(0 , 256), random(0, 256), random(0 , 256));
  }

}


void keyPressed()
{
  if (key == 'e') //enlarge
  {
    s = s + 15;
  }

  if (key == 's') //smaller
  {
    s = s - 15;
  }

  if (key == 'r')
  {
    boxcolor = color(255, 0, 0);
  }

  if (key == 'g')
  {
    boxcolor = color(0, 255, 0);
  }

if (key == 'b')
{
    boxcolor = color(0, 0, 255);
}

if(key == CODED)
{
  if(keyCode == UP)
  {
    y = y - 10;
  }

if(keyCode == DOWN)
{
    y = y + 10;
}

if(keyCode == LEFT)
{
  x = x - 10;
}

if(keyCode == RIGHT)
{
  x = x + 10;
}


}
if (s <= 0)
  {
    s = 0;
    fill(255);
    strokeWeight(0);
  }

}