Where is the delay in this script I found? [closed]

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