scrolling background

so i've got the scrolling background thing down for a side-scroller im making, but eventually i want to have the background image change from a wall to an outside scene, by changing the artwork as you walk along. i tried this but it's not working:

Code:

---

if (Key.isDown(Key.RIGHT)) {
                        if (crouching == false) {
                                wall._x -= 10;
                                walking = true;
                                player_mc.gotoAndStop("walk");
                                if (wall._x<=800) {
                                        walliteration++;
                                        if (walliteration == 2) {
                                                wall.gotoAndStop("transition");
                                                transition = true;
                                        }
                                        if (transition == true) {
                                                wall.gotoAndStop("wall2");
                                                walliteration -= 50;
                                        }
                                        wall._x = 1600;
                                }
                        }

---

walliteration is supposed to change to different frames of the background after the wall scrolls past you a few times, but it's not changing.

i figured it out- this is the new code:

Quote:

---

//walk button
if (Key.isDown(Key.RIGHT)) {
if (crouching == false && attack == false) {
if (mobattack == true && back == false) {
if (transition == true) {
wall.walltransition._x += 10;
} else {
wall._x += 10;
}
}
if (transition == true) {
wall.walltransition._x -= 10;
} else {
wall._x -= 10;
}
walking = true;
player_mc.gotoAndStop("walk");
if (transition == true) {
if (wall.walltransition._x<=-5600) {
wall.walltransition._x = -2400;
}
} else {
if (wall._x<=800) {
walkpoints++;
if (walkpoints>=4) {
wall.gotoAndStop("transition");
transition = true;
walkpoints = 0;
}
wall._x = 1600;
}
}
}

---

i reduced it from 3 different images to 2, and just used the MC within the first wall MC for the second one.