void setup() {

  size(800, 800);


  background(255);


  smooth();


}
float Mspeed;

void draw() {
  Mspeed=abs(mouseX-pmouseX);
  println(Mspeed);
  noStroke();
  float taille_ellipse=Mspeed;


  if (mousePressed == true) {
    strokeWeight(0.1+Mspeed/20);
    stroke(0, 50);
    strokeWeight(1+Mspeed/20);
    line(mouseX, mouseY, width, mouseX);
    line(mouseX, mouseY, 0, mouseX);
    noStroke();
    strokeWeight(5+Mspeed/20);
    line(pmouseX, pmouseY, mouseX, mouseY);
  }


  if (keyPressed == true) {


    background(255);
  }
}

void mouseMoved() {

}