how do I move objects (by 4 studs) using a mouse?

local Player = game.Players.LocalPlayer
local Mouse = Player:GetMouse()

Mouse.Move:connect(function()
	if Mouse.Target ~= nil then
		if Mouse.Target.Name == "Center" then
			for i,v in pairs (Mouse.Target.Parent:GetChildren()) do
				if v.Name == "Placed" then
					if v.Value == true then
						--Code deleted due to confusion
	end
end
end
end
end
end)

I want to make a model (with a center part) be moved at an increment of 4 studs via mouse movement.I tried using Mouse.Move:connect(function() but then didn't know how to make it only move by 4 studs at a time. Please help?