-- 創建序列
local keyframeSequence = Instance.new("KeyframeSequence")
keyframeSequence.Loop = false
keyframeSequence.Priority = Enum.AnimationPriority.Action

-- 創建一個關鍵幀
local keyframe = Instance.new("Keyframe")
keyframe.Time = 0

-- 創建樣本姿勢
local rootPose = Instance.new("Pose")
rootPose.Name = "HumanoidRootPart"
rootPose.Weight = 0
local lowerTorsoPose = Instance.new("Pose")
lowerTorsoPose.Name = "LowerTorso"
lowerTorsoPose.Weight = 1

-- 設置序列層次結構
rootPose:AddSubPose(lowerTorsoPose)
keyframe:AddPose(rootPose)
keyframeSequence:AddKeyframe(keyframe)

-- 將序列設為父級
keyframeSequence.Parent = workspace

local function getSequenceLength(keyframeSequence)
	local length = 0
	for _, keyframe in pairs(keyframeSequence:GetKeyframes()) do
		if keyframe.Time > length then
			length = keyframe.Time
		end
	end
	return length
end

local keyframeSequence = Instance.new("KeyframeSequence")

getSequenceLength(keyframeSequence)

local keyframeSequence = Instance.new("KeyframeSequence")
keyframeSequence.Parent = workspace

local keyframe = Instance.new("Keyframe")

keyframeSequence:AddKeyframe(keyframe)

task.wait(2)

keyframeSequence:RemoveKeyframe(keyframe)