Flashing selection boxes when moused over? (Coroutine help)

I've been working on an all-in-one mouse tool script, and have been having issues with getting selection boxes to display correctly. Everything works fine, except the selection boxes will flash constantly and I have no idea how to fix it. It seems the target is constantly un-registering and re-registering. I've tried making an idle checker , but even that didn't work. Here's the important code --

local mouse = game.Players.LocalPlayer:GetMouse()
local debounce = false
local debounce1 = false
local debounce2 = false
local debounce3 = false
local maintarg 

-- The next 3 functions are called upon by the function at the bottom, to save some reading

function Empty(target)
    if not debounce1 then
        debounce1 = true
        local selectionBox = Instance.new("SelectionBox", target) 
        selectionBox.Adornee = target 
        selectionBox.Color = BrickColor.new("Really red")
        repeat wait() until maintarg ~= target 
        selectionBox:Destroy()
    end
    debounce1 = false
end

function Storage(target)
    if not debounce2 then
        debounce2 = true
        local selectionBox = Instance.new("SelectionBox",target) 
        selectionBox.Adornee = target 
        selectionBox.Color = BrickColor.new("Bright orange")
        repeat wait() until maintarg ~= target
        selectionBox:Destroy()
    end
    debounce2 = false
end

function Housing(target)
    if not debounce3 then
        debounce3 = true
        local selectionBox = Instance.new("SelectionBox",target)
        selectionBox.Adornee = target 
        selectionBox.Color = BrickColor.new("Lime green")
        repeat wait() until maintarg ~= target
        selectionBox:Destroy()
    end
    debounce3 = false
end

mouse.Move:connect(function()
    if not debounce then
        debounce = true
        if mouse.Target then -- doesn't always catch skyboxes
            local maintarget = mouse.Target.Parent.Parent -- That's the model for all blocks in my game
            if mouse.Target and mouse.Target.Parent.Parent:FindFirstChild("type0") then -- a second check will protect from skyboxes
                Empty(mouse.Target.Parent.Parent)

            elseif mouse.Target and mouse.Target.Parent.Parent:FindFirstChild("type1") then
                Storage(mouse.Target.Parent.Parent)

            elseif mouse.Target and mouse.Target.Parent.Parent:FindFirstChild("type2") then
                Housing(mouse.Target.Parent.Parent)

            else
                maintarg = "Nil" -- Precautionary measure
            end
        end
        debounce = false
    end
end)

I've tried many things to get the flashing to end, but haven't yet accomplished it. I get the feeling the issue comes up with the repeat wait() until, or like I stated earlier, a changing target.

The camera is in "Scripted" if that matters.

Thank you for reading, and I look forward to fixing this annoying issue.

EDIT: I just tried adding coroutines to the script, since I'm quite sure the repeat wait() until pause was the culprit. However, it's not working correctly. This is the modified code with coroutines and an idle checker --

local mouse = game.Players.LocalPlayer:GetMouse()
local debounce = false
local debounce1 = false
local debounce2 = false
local debounce3 = false
local maintarg 
local selection
local moving = false
local debounceI = false

function Empty(target)
local EmptyC = coroutine.create(function()
    if not debounce1 then
        debounce1 = true
        local selectionBox = Instance.new("SelectionBox", target) 
        selectionBox.Adornee = target 
        selectionBox.Color = BrickColor.new("Really red")
        repeat wait() until maintarg ~= target and moving == true
        selectionBox:Destroy()
    end
    debounce1 = false
end)
end

function Storage(target)
local StorageC = coroutine.create(function()
    if not debounce2 then
        debounce2 = true
        target:FindFirstChild("InfoStorage", true).Enabled = true
        local selectionBox = Instance.new("SelectionBox",target) 
        selectionBox.Adornee = target 
        selectionBox.Color = BrickColor.new("Bright orange")
        repeat wait() until maintarg ~= target and moving == true
        target:FindFirstChild("InfoStorage", true).Enabled = false
        selectionBox:Destroy()
    end
    debounce2 = false
end)
end

function Housing(target)
local HousingC = coroutine.create(function()
    if not debounce3 then
        debounce3 = true
        target:FindFirstChild("InfoHousing", true).Enabled = true
        local selectionBox = Instance.new("SelectionBox",target)
        selectionBox.Adornee = target 
        selectionBox.Color = BrickColor.new("Lime green")
        repeat wait() until maintarg ~= target and moving == true
        target:FindFirstChild("InfoHousing", true).Enabled = false
        selectionBox:Destroy()
    end
    debounce3 = false
end)
end

mouse.Move:connect(function()
    moving = true
    if not debounce then
        debounce = true
        if mouse.Target ~= nil then
            local maintarget = mouse.Target.Parent.Parent
            if mouse.Target and mouse.Target.Parent.Parent:FindFirstChild("type0") then
                Empty(mouse.Target.Parent.Parent);

            elseif mouse.Target and mouse.Target.Parent.Parent:FindFirstChild("type1") then
                Storage(mouse.Target.Parent.Parent);

            elseif mouse.Target and mouse.Target.Parent.Parent:FindFirstChild("type2") then
                Housing(mouse.Target.Parent.Parent);

            else
                maintarg = "Nil"
            end
        end
        debounce = false
    end
end);

mouse.Idle:connect(function()
    if not debounceI then
        debounceI = true
        moving = false
        debounceI = false
    end
end)

This code isn't doing anything, since nothing seems to be executing after calling the functions containing the coroutines.

I also tried using coroutine.wrap instead of create, though it didn't work because the coroutines died and stopped the script, and to my knowledge, couldn't be revived.