hm....

what is the link?

See here please
http://processing.org/learning/objects/

use ctrl-t to auto format your code please

[edited]

1. //
2. // one car of class Car (class names start with a capital letter)
3. Car car;
4. //
5. void setup() {
6.   size (900, 990);
7.   car = new Car();
8. }
9. void draw() {
10.   background(0);
11.   car.display();
12.   car.drive();
13. }
14. // =========================================
15. class Car {
16.   color c;
17.   float xpos;
18.   float ypos;
19.   float xspeed;
20.   Car() {
21.     c = color(255);
22.     xpos = width/2;
23.     ypos = height/2;
24.     xspeed = 1;
25.   }
26.   void display() {
27.     rectMode(CENTER);
28.     fill(c);
29.     rect(xpos, ypos, 20, 10);
30.     // the wheels
31.     fill(255, 2, 2);
32.     rect(xpos-9, ypos-5, 4, 3);
33.     rect(xpos+9, ypos-5, 4, 3);
34.     rect(xpos-9, ypos+5, 4, 3);
35.     rect(xpos+9, ypos+5, 4, 3);
36.   }
37.   void drive() {
38.     xpos = xpos + xspeed;
39.     if (xpos > width) {
40.       xpos = 0;
41.     } // if
42.   } // func
43.   //
44. } // class
45. // END

Ah i see, thanks. On the tutorial it seemed like you were supposed to put 'class Car' before 'Car car', oh well

hello,

ah, it looks like you had setup and draw within the class which is not possible....
(you had the line "class Car { " before setup and draw.)

You can put the class defintion before the rest of the program or after it, both is allowed.
In the tutorials they put the class defintion after the rest of the program.

But the line

1. class Car {