Need help coding pacman for university

Processing Coding Questions
4

Here is my code so far

int pacSize = 10;
int direction = 1; 
int direction2 = 0;
float x = 20;
float  y = 300;
float speed = 1.5;
boolean halt = true;


void setup() {
  size(800, 200);
  smooth();
  noStroke();
  ellipseMode(RADIUS);
 drawTrack();
 
 }
  void drawTrack() {
    stroke(0, 0, 255); // Blue color for track
  strokeWeight(10);
  line(0, height / 2, width, height / 2); // Draw upper track
  line(0, height / 2 + 30, width, height / 2 + 30); // Draw lower track
}



void draw() {
  simulate();
  render();                                                
}
void simulate() {
  if ( !halt) {
    x += speed * direction;
    y += speed * direction2;
    x = (x + width) % width;
    y = (y + height) % height;
  }

}
void render() { 
  background(0);
  fill(255, 255, 0);
  for ( int i=-1; i < 2; i++) {
    for ( int j=-1; j < 2; j++) {
      pushMatrix();
      translate(x + (i * width), y + (j*height));
      if ( direction == -1) { 
        rotate(PI);
      }
      if ( direction2 == 1) { 
        rotate(HALF_PI);
      }
      if ( direction2 == -1) { 
        rotate( PI + HALF_PI );
      }
      arc(0, 0, pacSize, pacSize, map((millis() % 500), 0, 500, 0, 0.52), map((millis() % 500), 0, 500, TWO_PI, 5.76) );
      popMatrix();
    }
  }
}

void keyPressed() {
  if (keyCode == 32) { // Spacebar
    direction *= -1; // Change direction
      direction = 1;
      direction2 = 0;
      halt = false;
  }
}
void keyReleased() {
      if (keyCode == 32) { // Spacebar
    direction *= 1; // Change direction
      direction = -1;
      direction2 = 0;
      halt = false;
      }
}

I am having troubles trying to separate the track from pac-man as the “Fill” command also goes onto him. Also cant figure out how to make it so i only need to press the spacebar once to change directions.