Objetos: ejemplo coche

Car myCar1;

Car myCar2; 

void setup() {

  size(800,600);

  myCar1 = new Car(color(255,0,0),800,400,-5);

  myCar2 = new Car(color(0,0,255),0,300,5);

}

void draw() {

  background(255);

  myCar1.drive();

  myCar1.display();

  text(myCar1.xpos,400,200);

  myCar2.drive();

  myCar2.display();

}

class Car {

  color c;

  float xpos;

  float ypos;

  float xspeed;

  Car(color tempC, float tempXpos, float tempYpos, float tempXspeed) {

    c = tempC;

    xpos = tempXpos;

    ypos = tempYpos;

    xspeed = tempXspeed;

  }

  void display() {

    stroke(0);

    fill(c);

    rectMode(CENTER);

    rect(xpos,ypos,20,10);

  }

  void drive() {

    xpos = xpos + xspeed;

    if (xpos > width && xspeed>0) {

      xpos = 0;

    }

    xpos = xpos + xspeed;

    if (xpos < 0 && xspeed<0) {

      xpos = 800;

    }

  }

}