Resize frame

[Resike]

I would like to resize a frame with the mouse, just like the chat frame resizing, however i don't want anything fancy i just want to increase and decrase the scale of the frame based on the mouse's position. Here is my code so far:

local function LeftButtonOnUpdate(frame, elapsed)
    --frame.x = math.floor(frame:GetLeft() + (frame:GetWidth() - UIParent:GetWidth()) / 2 + 0.5)
    --frame.y = math.floor(frame:GetTop() - (frame:GetHeight() + UIParent:GetHeight()) / 2 + 0.5)
    FRAMETORESIZE:SetScale(FRAMETORESIZE:GetScale() * 1.001)
end
 
local function SizeOnMouseDown(frame, button)
    if button == "LeftButton" then
        frame.x, frame.y = GetCursorPosition()
        frame:SetScript("OnUpdate", LeftButtonOnUpdate)
    end
end
 
local function SizeOnMouseUp(frame, button)
    if button == "LeftButton" then
        frame:SetScript("OnUpdate", nil)
    end
end
 
function ResizeStart(frame)
    frame:SetScript("OnMouseDown", SizeOnMouseDown)
    frame:SetScript("OnMouseUp", SizeOnMouseUp)
end