Increase speed with each step?

How to increase speed every time you walk? For example, each step you take increases speed 1

Put this in starter player.

script.Parent.Humanoid.Running:Connect(function(speed)  
   while (speed > 0)
   do
   print("Player is moving")
   speed += 1
   wait(1) -- change to how long it takes to take a step
   end
   print("Player stopped")
   -- if you want to reset speed when they stop, do it here (default speed is 16)
end)

This script is not tested.