test

local HitboxSize = Vector3.new(10,10,10) --too big wont work

if getgenv().c then getgenv().c:Disconnect() end

getgenv().c = game:GetService("RunService").RenderStepped:Connect(function()

    for _,v in pairs(workspace:GetChildren()) do

       if v:IsA("BasePart") and v.Color == Color3.new(1,0,0) then

          v.Transparency = 0.5

          v.Size = HitboxSize

       end

    end

end)