Hover,Keystrokes,Processing

boolean colorA = false;
boolean colorB = false;
PFont f;

  char a = 'R';
  float ax = 80;
  float ay = 80;

  char b = 'P';
  float bx = 180;
  float by = 80;

void setup() {
  size(640, 360);
  f = createFont("Arial",20,true);
}

void draw() {
  background(0);
  textFont(f);
  float cwA = textWidth(a);
  float cwB = textWidth(b);

  // Text A
  if (colorA == true) {
    fill(204, 102, 0);
    if (mouseX > ax-cwA/2.0 && mouseX < ax+cwA/2.0 &&
        mouseY > ay-2*cwA && mouseY < ay) {
      fill(204, 102, 0);
      colorA = false;
    }
  } else {
    if (mouseX > ax-cwA/2.0 && mouseX < ax+cwA/2.0 &&
        mouseY > ay-2*cwA && mouseY < ay) {
      fill(204, 102, 0);
    } else {
      fill(255);
    }
  }
  text(a, ax-cwA/2.0, ay-cwA/2.0);

  // Text B
  if (colorB == true) {
    fill(204, 102, 0);
  } else {
    fill(255);
  }
  text(b, bx-cwB/2.0, by-cwB/2.0);
}

void keyPressed() {
  if (key >= 'P' && key <= 'p') {
    if (colorB == true) {
      colorB = false;
    } else {
      colorB = true;
    }
  }
  if (key == CODED) {
    if (keyCode == LEFT || keyCode == RIGHT) {
    if (colorB == true) {
      colorA = true;
      colorB = false;
    } else {
      colorA = false;
      colorB = true;
    }
    }
  }
}