How to make a slider where you have to hit the middle of it in order to cause it to go to another scene - actionscript-3

Question

I am new to flash and want to make a slider where something moves back and for until you hit space bar in order to make land in the middle which would trigger a new scene. Sort of like a mini game.
Again im really new to actionscript so any help would be nice. I was thinking of calling like a function where the pointer is continuously moving until the space bar is hit. But Im really stuck. Please and thank you for your time.

Answer 1

Make sure your slider has the instance name "slider". Then try this code:
//x position of the most left position of the slider
var left_limit:Number = 50
//x position of the most right position of the slider
var right_limit:Number = 250
var speed:Number = 10
var dir:int = 1
//How close the slider has to be to the middle to trigger the next scene
var tolerance:Number = 10
addEventListener(Event.ENTER_FRAME,loop)
addEventListener(KeyboardEvent.KEY_DOWN,keydown)
function loop(e:Event){
slider.x += speed*dir
if(slider.x>right_limit){
slider.x = right_limit
dir = -1
}else if(slider.x<left_limit){
slider.x = left_limit
dir = 1
}
}
function keydown(e:KeyboardEvent){
if(e.keyCode==Keyboard.SPACE){
removeEventListener(Event.ENTER_FRAME,loop)
if(Math.abs((slider.x-left_limit)-(right_limit-left_limit)/2)<tolerance){
//succeeded go to next scene
gotoAndStop("scene2")
}else{
//failed
}
}
}