local hitboxName         = "HumanoidRootPart"
local hitboxCollides     = false
local hitboxTransparency = 0
local hitboxSizeLarge    = Vector3.new(20, 20, 1)
local hitboxSizeNormal   = Vector3.new(2, 2, 1)





local players = game:GetService("Players")
local runService = game:GetService("RunService")
local inputService = game:GetService("UserInputService")
local player = players.LocalPlayer

local properties = {
    CanCollide   = hitboxCollides,
    Transparency = hitboxTransparency,
    Size         = hitboxSizeLarge,
}





runService.Heartbeat:connect(function()
    local character      = player.Character
    local rootPart       = character and character.PrimaryPart
    local hitboxPosition = rootPart and (rootPart.Position + Vector3.new(0,0,6))
    if typeof(hitboxPosition) ~= "Vector3" then
        return
    end
    for _, otherPlayer in pairs(players:GetPlayers()) do
        if otherPlayer ~= player then
            local character = otherPlayer.Character
            if character and character.Parent then
                local hitbox = character:FindFirstChild(hitboxName)
                if hitbox and hitbox:IsA("BasePart") then
                    for property, value in pairs(properties) do
                        hitbox[property] = value
                    end
                    hitbox.Position = hitboxPosition
                end
            end
        end
    end
end)

inputService.InputBegan:connect(function(input, wasProcessed)
    if wasProcessed then return end
    if input.UserInputType == Enum.UserInputType.Keyboard then
        if input.KeyCode == Enum.KeyCode.H then
            if properties.Size == hitboxSizeLarge then
                properties.Size = hitboxSizeNormal
            else
                properties.Size = hitboxSizeLarge
            end
        elseif input.KeyCode == Enum.KeyCode.J then
            properties.CanCollide = not properties.CanCollide
        elseif input.KeyCode == Enum.KeyCode.K then
            properties.Transparency = math.clamp(properties.Transparency - 0.1, 0, 1)
        elseif input.KeyCode == Enum.KeyCode.L then
            properties.Transparency = math.clamp(properties.Transparency + 0.1, 0, 1)
        end
    end
end)