Crawl Script

local player = game.Players.LocalPlayer
local Mouse = player:GetMouse()
local Animate
local Humanoid = player.Character:FindFirstChild("Humanoid")

Mouse.KeyDown:Connect(function(Key)
	if Key == "c" then
		local Anim = Instance.new("Animation",player.Character)
		Anim.AnimationId = "rbxassetid://YOUR ID"

		Animate = Humanoid:LoadAnimation(Anim)
		Animate:Play()
	end
end)

Mouse.KeyUp:Connect(function(Key)
	if Key == "c" then
		Animate:Stop()
	end
end)