--first method (render stepped) less cpu ussage overall best, but more complex

rs = game:GetService("RunService") --reference run service for looping
rs.RenderStepped:Connect(function() --every frame
	game:GetService("Players").LocalPlayer.Character.Humanoid.WalkSpeed = 100 --walkspeed
	
	game:GetService("Players").LocalPlayer.Character.Humanoid.JumpHeight = 100 --jumpheight
end)

--2nd method (while wait(0)do) easier but runs every 0.03 - 0.05 seconds and higher cpu ussage

while wait(0)do
	game:GetService("Players").LocalPlayer.Character.Humanoid.WalkSpeed = 100 --walkspeed
	
	game:GetService("Players").LocalPlayer.Character.Humanoid.JumpHeight = 100 --jumpheight
end

--OPTIONAL: wrap while wait(0) in task.spawn to prevent it yielding the script
--or you can just put the loop at the bottom of the script

local function mainloop()
	while wait(0)do --about every frame
		game:GetService("Players").LocalPlayer.Character.Humanoid.WalkSpeed = 100 --walkspeed
	
		game:GetService("Players").LocalPlayer.Character.Humanoid.JumpHeight = 100 --jumpheight
	end
end

task.spawn(mainloop) --runs it without yielding