Escaping button thing

[Jex]

I'm bored and tryied create little game. Left and right sides (22 and 24 lines) working good but up and down sides move button randomly? (26 and 28 lines) I can't figure out what is problem, maybe im doing small mistake

#include <GUIConstants.au3>

Opt("MouseCoordMode", 2)
$Width = 500
$Height = 500

$Gui = GuiCreate("Test",$Width,$Height)
$Button = GUICtrlCreateButton("",250,250,50,50)
GUISetState()

While 1
    $msg = GUIGetMsg()
    If $msg = -3 Then Exit
    $Pos = MouseGetPos()
    $ControlPos = ControlGetPos("","",$Button)
    If $Pos[0] >= 0 And $Pos[0] <= $Width And $Pos[1] >= 0 And $Pos[1] <= $Height Then ;If mouse inside window
        ToolTip("Mouse X: " & $Pos[0] & " Y: " & $Pos[1] & " Button X: " & $ControlPos[0] & " Y: " & $ControlPos[1])
        $x1 = $ControlPos[0] - 20
        $x2 = $ControlPos[0] + $ControlPos[2] + 20
        $y1 = $ControlPos[1] - 20
        $y2 = $ControlPos[1] + $ControlPos[3] + 20
        If $Pos[0] > $x1 And $Pos[0] < $x1 + 20 And $Pos[1] > $y1 + 20 And $Pos[1] < $y2 - 20 Then ;Left
            GUICtrlSetPos($Button, $Pos[0] + 20, $ControlPos[1])
        ElseIf $Pos[0] < $x2 And $Pos[0] > $x2 - 20 And $Pos[1] > $y1 + 20 And $Pos[1] < $y2 - 20 Then ;Right
            GUICtrlSetPos($Button, ($Pos[0] - $ControlPos[2]) - 20, $ControlPos[1])
        ElseIf $Pos[1] > $y1 And $Pos[1] < $y1 + 20 And $Pos[0] > $x1 + 20 And $Pos[0] < $x2 - 20 Then ;Up
            GUICtrlSetPos($Button, $Pos[1] + 20, $ControlPos[0])
        ElseIf $Pos[1] < $y2 And $Pos[1] > $y2 - 20 And $Pos[0] > $x1 + 20 And $Pos[0] < $x2 - 20 Then ;Down
            GUICtrlSetPos($Button, ($Pos[1] - $ControlPos[3]) - 20, $ControlPos[0])
        EndIf
    EndIf
WEnd

[Nahuel]

#include <GUIConstants.au3>

Opt("MouseCoordMode", 2)
$Width = 500
$Height = 500

$Gui = GuiCreate("Test",$Width,$Height)
$Button = GUICtrlCreateButton("",250,250,50,50)
GUISetState()

While 1
    $msg = GUIGetMsg()
    If $msg = -3 Then Exit
    $Pos = MouseGetPos()
    $ControlPos = ControlGetPos("","",$Button)
    If $Pos[0] >= 0 And $Pos[0] <= $Width And $Pos[1] >= 0 And $Pos[1] <= $Height Then ;If mouse inside window
        ToolTip("Mouse X: " & $Pos[0] & " Y: " & $Pos[1] & " Button X: " & $ControlPos[0] & " Y: " & $ControlPos[1])
        $x1 = $ControlPos[0] - 20
        $x2 = $ControlPos[0] + $ControlPos[2] + 20
        $y1 = $ControlPos[1] - 20
        $y2 = $ControlPos[1] + $ControlPos[3] + 20
        If $Pos[0] > $x1 And $Pos[0] < $x1 + 20 And $Pos[1] > $y1 + 20 And $Pos[1] < $y2 - 20 Then ;Left
           GUICtrlSetPos($Button, $Pos[0] + 20, $ControlPos[1])
        ElseIf $Pos[0] < $x2 And $Pos[0] > $x2 - 20 And $Pos[1] > $y1 + 20 And $Pos[1] < $y2 - 20 Then ;Right
            GUICtrlSetPos($Button, ($Pos[0] - $ControlPos[2]) - 20, $ControlPos[1])
        ElseIf $Pos[1] > $y1 And $Pos[1] < $y1 + 20  And $Pos[0] > $x1 And $Pos[0] < $x2 -20 Then ;Down
            GUICtrlSetPos($Button,$ControlPos[0] , $Pos[1] + 20)
        ElseIf $Pos[1] < $y2 And $Pos[1] > $y2 - 20 And $Pos[0] > $x1 + 20 And $Pos[0] < $x2 - 20 Then ;Up
            GUICtrlSetPos($Button,$ControlPos[0] ,($Pos[1] - $ControlPos[3]) - 20 )
        EndIf
    EndIf
WEnd

[Jex]

Thanks