class Point {
  int x;
  int y;
  Point(int x, int y) {
    this.x = x;  this.y = y;
  }
    
  Point(Point p) {
    x = p.x;
    y = p.y;
  }
}

void affichePoint(Point p) {
  println(p.x, p.y);
}

void setup() {

  size(1000,500);
  background(255);
  frameRate(24); 
}

Point pCur;
Point pPrev;

void draw() {
  pCur = new Point(mouseX, mouseY);
  affichePoint(pCur);

  if (pPrev != null) {
    line(pCur.x,pCur.y,pPrev.x,pPrev.y);
  }
  pPrev = new Point(pCur);

}