how create a simple object animation in processing - processing

Question

QUESTION
I'm trying to create a simple object "car" animation in Processing.
My code is:
Car car;
void setup(){
size(800, 600);
background(#818B95);
frameRate(30);
car = new Car(10,10);
}
void draw(){
//refresh background
background(#818B95);
print("-");
car.drawCar();
}
void mouseClicked() {
car.run();
}
public class Car implements Runnable{
private int pos_x, pos_y;
public Car(int pos_x, int pos_y){
this.pos_x = pos_x;
this.pos_y = pos_y;
}
public void drawCar(){
rect(pos_x,pos_y,10,10);
}
public void run(){
while(true){
pos_x += 10;
print("*");
delay(200);
}
}
}
I'm expecting to see the car/rectangle move right when I click the mouse button, but nothing happens.
I've added the two print in order to see if the draw method and my car.run are executed in parallel showing some * and - printed alternately.
What I see is a sequence of - until I click and then only * are printed.
Is it possible that starting a new object thread will stop the main draw cycle?
SOLUTION
This is just a variant of the suggested solution (by Mady Daby) without using threads.
Car car;
void setup(){
size(800, 600);
background(#818B95);
frameRate(30);
car = new Car(10,10);
}
void draw(){
//refresh background
background(#818B95);
print("-");
car.drawCar();
}
void mouseClicked() {
car.moving = true;
}
public class Car{
private int pos_x, pos_y;
boolean moving = false;
public Car(int pos_x, int pos_y){
this.pos_x = pos_x;
this.pos_y = pos_y;
}
public void drawCar(){
rect(pos_x,pos_y,10,10);
//animation
if(moving){
pos_x += 10;
print("*");
}
}
}

Answer 1

You could make the car move right by just introducing a boolean variable to track whether the car is supposed to be moving right moving and then increment pos_x if moving is true. You can also use the clicks to toggle between moving and not moving.
Car car;
void setup() {
size(800, 600);
background(#818B95);
frameRate(30);
car = new Car(10, 10);
}
void draw() {
//refresh background
background(#818B95);
print("-");
car.drawCar();
}
void mouseClicked() {
car.toggleMoving();
}
public class Car implements Runnable {
private int pos_x, pos_y;
private boolean moving = false;
public Car(int pos_x, int pos_y) {
this.pos_x = pos_x;
this.pos_y = pos_y;
}
public void toggleMoving() {
moving = !moving;
}
public void drawCar() {
if (moving) {
this.run();
}
rect(pos_x, pos_y, 10, 10);
}
public void run() {
pos_x += 10;
print("*");
delay(200);
}
}