Help with gui that goes from one point to your mouse?

I tried making a line that follows one point to your mouse, but it worked when i used it on two parts but because the center of a gui is in the left corner it was very wierd. I have tried fixing in a multiple ways it but none worked.

mouse = script.Parent.Parent.Parent.Parent:GetMouse()
node = script.Parent.Parent.Frame.Nodein1
line = script.Parent

function move()
    local x1 = node.AbsolutePosition.X+25
    local y1 = node.AbsolutePosition.Y+25
    local x2 = mouse.X
    local y2 = mouse.Y
    local deg = math.atan2(y1-y2,x1-x2)*180.0/math.pi
    line.Size = UDim2.new(0,math.sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1)),0,10) 
    line.Position = UDim2.new(0,(x1+x2)/2-5,0,(y1+y2)/2-5)
    line.Rotation = deg
    print(deg)
end

mouse.Move:connect(move)