autoit pixelsearch help

[archeart]

Hi im new here and slowly learning the language.

well here is my problem

PHP Code:

HotKeySet("{ESC}", "Terminate")
HotKeySet("!c", "getColor")
HotKeySet("!a", "attackLoop")

Global $color
Global $interval
$interval = "10000"

MsgBox(0, "Starting Up", "Starting, use ESCAPE to quit, Alt + C to set color, and Alt + A to attack.")

Func Terminate()
   Exit 1
EndFunc

Func getColor()
   $point = MouseGetPos()
   $color = PixelGetColor($point[0], $point[1])
   MsgBox(0, "Color Set", "The color has been set to " & $color)
EndFunc

Func attackLoop()   
   While 1
          $point = PixelSearch(60, 157, 1772, 759, $color,10)
          if IsArray($point) Then
                 MouseClick("left", $point[0], $point[1])
                 Sleep($interval)
          EndIf
          Sleep(50)
   WEnd
EndFunc

While 1
   sleep(250)
WEnd 


This is made to find the pixel that is chosen by the function getColor and it does what I want like finding the pixel(well still not sure on how to put shading variation) but im lost on what to do to make it do mouseclick RIGHT whenever the pixel is not available and can I limit the search to a smaller screen? say 800x600 just wanted to know if thats possible.

Hope to hear from you guys

thanks