class LimitedQueue
{	
	__New()
	{
		this.size := 3
		this.cells := Array()
	}
	
	addElement(element)
	{
		if (this.cells.MaxIndex() < this.size)
		{
			this.cells.Push(var)
		}
		else
		{
			Loop, % this.size - 1
				this.cells[A_Index] := this.cells[A_Index + 1]
			this.cells[this.size] := var
		}
	}
	
	Display()
	{
		arr := this.cells
		Loop, % arr.MaxIndex()
		{
			s := arr[A_Index]
			Display(%s%)
		}
	}
}

Display(s)
{
	MsgBox, %s%
}

obj := new LimitedQueue()

obj.addElement("Hello world")
obj.addElement("Hello world")
obj.addElement("Hello world")
Display(obj.cells[1])