Calculate correct delay for pro game

config/config.exs

@@ -52,9 +52,6 @@ config :ex_speed_game,
   # Delay at start of game between ticks, in milliseconds.
   delay_start: 570,
 
-  # Delay at start of pro game
-  delay_pro: 321,
-
   # Score at start of pro game
   score_pro: 100,
 

lib/game/menu.ex

@@ -11,16 +11,19 @@ defmodule ExSpeedGame.Game.Menu do
 
   alias ExSpeedGame.PubSub
 
+  @initial_delay Application.compile_env!(:ex_speed_game, :delay_start)
+  @pro_score Application.compile_env!(:ex_speed_game, :score_pro)
+
   @menu {
     {"SpeedGame", Speed,
      %Speed.Options{
        initial_score: 0,
-       initial_delay: Application.get_env(:ex_speed_game, :delay_start)
+       initial_delay: @initial_delay
      }},
     {"SpeedGame Pro", Speed,
      %Speed.Options{
-       initial_score: Application.get_env(:ex_speed_game, :score_pro),
-       initial_delay: Application.get_env(:ex_speed_game, :delay_pro)
+       initial_score: @pro_score,
+       initial_delay: Speed.get_delay_at(@pro_score, @initial_delay)
      }},
     {"MemoryGame", Speed, %{}},
     {"Show IP", ShowIP, %{}},

lib/game/modes/speed.ex

@@ -128,6 +128,13 @@ defmodule ExSpeedGame.Game.Modes.Speed do
     ButtonInput.release(ButtonInput)
   end
 
+  @spec get_delay_at(integer(), float()) :: float()
+  def get_delay_at(score, initial_delay) do
+    for _i <- 1..score, reduce: initial_delay do
+      acc -> get_next_delay(acc)
+    end
+  end
+
   @spec schedule_tick(float()) :: float()
   defp schedule_tick(delay) do
     Process.send_after(self(), :tick, trunc(delay))

mix.exs

@@ -2,7 +2,7 @@ defmodule ExSpeedGame.MixProject do
   use Mix.Project
 
   @app :ex_speed_game
-  @version "0.3.0"
+  @version "0.3.1"
   @all_targets [:rpi0]
 
   def project do