Can somebody help me make a script which makes you stop when you click/run your animation?

What i want to do is make it so when you right click/run animation it puts your jumppower and walkspeed to 0 so you can't move for 3 seconds

the script is a local script and is in a tool

local canUse = true
 
script.Parent.Equipped:Connect(function(Mouse)
	Mouse.Button2Down:Connect(function()
		if canUse then
			canUse = false
			animation = game.Players.LocalPlayer.Character.Humanoid:LoadAnimation(script.Parent.Heavy1)
			animation:Play()
			wait(3)
			canUse = true
		end
	end)
end)
 
script.Parent.Unequipped:Connect(function()
		animation:Stop()
end)

Just before you play the animation, set the walk speed and jump power to 0.

local tool = script.Parent
local client = game:GetService("Players").LocalPlayer -- # you can name the variable player if you want
local canUse = true
local animation
local connection

tool.Equipped:Connect(function(Mouse)
	connection = Mouse.Button2Down:Connect(function()
		if canUse then
			local humanoid = client.Character.Humanoid
			canUse = false
			humanoid.WalkSpeed = 0
			humanoid.JumpPower = 0
			animation = humanoid:LoadAnimation(tool.Heavy1)
			animation:Play()
			wait(3)
			humanoid.WalkSpeed = 16
			humanoid.JumpPower = 50
			canUse = true
		end
	end)
end)

tool.Unequipped:Connect(function()
	local humanoid = client.Character.Humanoid
	humanoid.WalkSpeed = 16
	humanoid.JumpPower = 50
	animation:Stop()
	connection:Disconnect()
end)

The default WalkSpeed is 16, where the default JumpPower is 50. You can also notice the predeclared animation and connection variables. The animation variable is there so that you do not need to use a global variable. The usage of global variables is bad practice, they make your code base a mess.

The animation variable is instead available as an upvalue (external local variable) in the event listeners, and I disconnect connections since your Button2Down event listener is nested in your Equipped event listener, which means new connections are being created each time you equip the tool.