"a rig that damages you if your in a 3 stud range, and plays an animation every time your in a 3 stud range, it doesn't work"

-- server script 
local rig = game.Workspace.Rig
local damageAmount = 10
local animationId = "rbxassetid://123456789" -- Replace with your animation ID
local animation = Instance.new("Animation")
animation.AnimationId = animationId
local animationTrack

local function checkPlayersInRange()
    for _, player in ipairs(game.Players:GetPlayers()) do
        local character = player.Character
        if character and character:FindFirstChild("HumanoidRootPart") and character:FindFirstChild("Humanoid") then
            local distance = (rig.Position - character.HumanoidRootPart.Position).magnitude
            if distance <= 3 then
                character.Humanoid:TakeDamage(damageAmount)
                if not animationTrack then
                    animationTrack = rig.Humanoid:LoadAnimation(animation)
                end
                if not animationTrack.IsPlaying then
                    animationTrack:Play()
                end
            end
        end
    end
end

while true do
    checkPlayersInRange()
    wait(1)
end