DamageIndicator

local tweenService = game:GetService("TweenService")

local tweenInfo = TweenInfo.new(0.3, Enum.EasingStyle.Quint, Enum.EasingDirection.InOut)

local damageForColours =
{
    [25] = Color3.fromRGB(255, 196, 101),
    [50] = Color3.fromRGB(255, 234, 0),
    [75] = Color3.fromRGB(255, 140, 0),
    [100] = Color3.fromRGB(255, 0, 0),
}

game.Players.PlayerAdded:Connect(function(plr)

    plr.CharacterAdded:Connect(function(char)

        local humanoid = char:WaitForChild("Humanoid")
        local currentHealth = humanoid.Health

        humanoid.HealthChanged:Connect(function(health)

            if health < currentHealth and humanoid:GetState() ~= Enum.HumanoidStateType.Dead then

                local healthLost = math.floor(currentHealth - health)


                local damageIndicatorGui = Instance.new("BillboardGui")
                damageIndicatorGui.AlwaysOnTop = true

                damageIndicatorGui.Size = UDim2.new(1.5, 0, 1.5, 0)

                local offsetX = math.random(-10, 10)/10
                local offsetY = math.random(-10, 10)/10
                local offsetZ = math.random(-10, 10)/10
                damageIndicatorGui.StudsOffset = Vector3.new(offsetX, offsetY, offsetZ)

                local damageIndicatorLabel = Instance.new("TextLabel")

                damageIndicatorLabel.AnchorPoint = Vector2.new(0.5, 0.5)
                damageIndicatorLabel.Position = UDim2.new(0.5, 0, 0.5, 0)

                damageIndicatorLabel.TextScaled = true
                damageIndicatorLabel.BackgroundTransparency = 1
                damageIndicatorLabel.Font = Enum.Font.GothamBlack

                damageIndicatorLabel.Text = healthLost

                damageIndicatorLabel.Size = UDim2.new(0, 0, 0, 0)

                for damage, colour in pairs(damageForColours) do

                    if healthLost <= damage then

                        damageIndicatorLabel.TextColor3 = colour
                        damage = 100
                    end
                end

                damageIndicatorLabel.Parent = damageIndicatorGui

                damageIndicatorGui.Parent = char.HumanoidRootPart

                damageIndicatorLabel:TweenSize(UDim2.new(1, 0, 1, 0), "InOut", "Quint", 0.3)


                wait(0.3)

                local guiUpTween = tweenService:Create(damageIndicatorGui, tweenInfo, {StudsOffset = damageIndicatorGui.StudsOffset + Vector3.new(0, 1, 0)})

                local textFadeTween = tweenService:Create(damageIndicatorLabel, tweenInfo, {TextTransparency = 1})

                guiUpTween:Play()
                textFadeTween:Play()

                game:GetService("Debris"):AddItem(damageIndicatorGui, 0.3)
            end

            currentHealth = humanoid.Health
        end)
    end)
end)