Where is the delay in this script I found?

I discovered a script for a kind of raycasting, and within it, there is some sort of "delay" for when the next laser is shot, after the previous laser has, but I can't figure out where it is, or how it was written. Help please?

while true do
	wait(0.1)
	function Shoot()
		
		local laser = Instance.new("Part")
		laser.Name = "Laser"
		laser.FormFactor = Enum.FormFactor.Custom
		laser.TopSurface, laser.BottomSurface = 0, 0
		laser.Size = Vector3.new(0.1, 0.1, 0.2)
		laser.BrickColor = BrickColor.Random()
		laser.Material = Enum.Material.Neon
		laser.Anchored = true
		laser.CanCollide = false
		laser.Locked = true
		laser.CFrame = script.Parent.CFrame
		laser.Parent = game.Workspace
		
		local maxDistance = 400
		local curDistance = 0
		
		local stepDistance = 4
		local stepWait = 0
		
		local currentPos = script.Parent.Position
		local currentNormal = script.Parent.CFrame.lookVector
		
		local function Step(overrideDistance)
			
			-- Cast ray:
			local ray = Ray.new(currentPos, currentNormal * (overrideDistance or stepDistance))
			local hit, pos, norm = game.Workspace:FindPartOnRayWithIgnoreList(ray, {script.Parent})
	
			-- Update laser position:
			laser.Size = Vector3.new(0.4, 0.4, (pos - currentPos).magnitude)
			laser.CFrame = CFrame.new(currentPos:lerp(pos, 0.5), pos)
			
			local oldPos = currentPos
			currentPos = pos
			
			if (hit) then
				-- r = d - 2(d DOT n)n
				-- Reflect:
				local reflect = (currentNormal - (2 * currentNormal:Dot(norm) * norm))
				currentNormal = reflect
				Step(stepDistance - (pos - oldPos).magnitude)
				return
			end
			
			curDistance = (curDistance + (pos - oldPos).magnitude)
			
			-- Apply fade effect to laser as it approaches max distance from < 75 studs:
			if (curDistance > (maxDistance - 75)) then
				local d = (curDistance - (maxDistance - 75)) / 75
				laser.Transparency = d
			end
			
			-- Recurse if max distance not reached:
			if (curDistance < maxDistance) then
				wait(stepWait)
				Step()
			end
		end
		
		Step()
		
		-- Done! Destroy laser:
		laser:Destroy()
		
	end
	
	Shoot() -- Fire shot!
end