//Intergers/Variables//
  int pacX = 50;
  int pacY = 300;
  int pacDX = 1;
  int pacDY = 1;
  int pacSize = 50;
  color yellow = color(255, 255, 0);
  color black = color(0);
  color white = color(255);
  color paccolor = (yellow);
  float r= random(255), g= random(255), b= random(255);
  color pacrandom = color (r, g, b);

//Size of the screen//
void setup() {
  size(600, 600);
  smooth();
}

//Pac-Man -- Text//
void draw() {
  background (0);
  fill(black); 
  textSize(12);
  text("Press H for Help Menu", 20, 20);
  if (key == 'H' ) {
    help();
  }else{
  pacman();
  pacboundaries();
  pacturnX();
  sign();
  cheats();
}
}

//Pac-Man Sign//
void title() {
  fill(random(255),random(255),0);
  textSize(20);
  text("Pac-Man", width/2.3, height/8);
  stroke(random(255), random(255), random(255));
  strokeWeight(5);
  noFill();
  rect(200,20,200,100);
}

//Pac-Man//
void pacman() {
  noStroke();
  fill(paccolor);
  arc (pacX, pacY, pacSize, pacSize, radians(0), radians(360));
}

//Pac-Man Mouth Closed -- Right//
void paccloseR() {
  stroke(black);
  strokeWeight(3);
  line(pacX, pacY, pacX+50, pacY);
}

//Pac-Man Mouth Closed -- Left//
void paccloseL() {
  stroke(black);
  strokeWeight(3);
  line(pacX, pacY, pacX-50, pacY);
}

//Boundaries//
void pacboundaries() {
if (pacX < 25 || pacX > 580) pacDX *= -1;
if (pacY < 25 || pacY > 580) pacDY *= -1;
  pacX += pacDX;
  pacY += pacDY;
}

//Pac-Man turning around X//
void pacturnX() {
if (pacDX == 1) {
  paccloseR();
  opencloseR();
}else{
  paccloseL();
  opencloseL();
}
}

//Pac-Man Open Close Mouth -- Right//
void opencloseR() {
  if ( (frameCount/10) % 2 > 0){
    fill(black);
    //below is code for Pac-Man's open mouth -- Right//
    arc (pacX, pacY, pacSize, pacSize, radians(325), radians(400));
  }else{
   paccloseR();
}
}

//Pac-Man Open Close Mouth -- Left//
void opencloseL() {
  if ( (frameCount/10) % 2 > 0){
    fill(black);
    //below is code for Pac-Man's open mouth -- Left//
    arc (pacX, pacY, pacSize, pacSize, radians(140), radians(220));
  }else{
   paccloseL();
}
}

//Pac-Man Cheats//
void cheats() {
 if (key == '+') {
   pacSize = 100;
 }else{
   pacSize = 50;
 }
 if (key == '*') {
  paccolor = pacrandom;
}else{
  paccolor = yellow;
}
}

//Pac-Man Sign//
void sign() {
  fill(random(255),random(255),0);
  textSize(20);
  text("Pac-Man", width/2.3, height/8);
  stroke(random(255), random(255), random(255));
  strokeWeight(5);
  noFill();
  rect(200,20,200,100);
}

//Help Screen//
void help() {
  fill(white);
  textSize(25); 
  text("Press C to change Pac-Man's color", width/6, height/2);
  text("Press S to change Pac-Man's size", width/8, height/4);
}