diff --git a/main/steps/step4.cpp b/main/steps/step4.cpp
index 3ca27d0..32f1766 100644
--- a/main/steps/step4.cpp
+++ b/main/steps/step4.cpp
@@ -1,5 +1,100 @@
+#include "step4.h"
+
 static const char *TAG = "step4";
 
+static int tone = 0;
+static int times = 0;
+
+static std::random_device rd;
+static std::mt19937 gen(rd());
+static std::uniform_int_distribution<> tone_dist(0, 5);
+static std::uniform_int_distribution<> color_dist(0, 5);
+
+static uint8_t NEOPIXEL_COLORS[6][3] = {
+    {20, 0, 0},  // red
+    {20, 10, 0}, // orange
+    {20, 20, 0}, // yellow
+    {0, 20, 0},  // green
+    {0, 0, 20},  // blue
+    {20, 0, 20}, // purple
+};
+
+static void play_tone();
+static bool one_second();
+static bool three_second();
+static bool six_second();
+
 void step4(void) {
-    
+    // start counting down module timer immediatly
+    set_module_time(10*1000);
+    start_module_timer();
+
+    while (get_module_time() > 0) vTaskDelay(pdMS_TO_TICKS(100));
+
+    while (times < 4) {
+        tone = tone_dist(gen);
+        play_tone();
+        switch (tone % 3) {
+            case 0:
+            if (one_second()) {
+                times++;
+            }
+            break;
+            case 1:
+            if (three_second()) {
+                times++;
+            }
+            break;
+            case 2:
+            if (six_second()) {
+                times++;
+            }
+            break;
+        }
+        vTaskDelay(pdMS_TO_TICKS(1000));
+    }
+}
+
+static bool one_second() {
+    set_module_time(30*1000);
+    start_module_timer();
+
+    int speaker_indicator_color = color_dist(gen);
+
+    while (get_module_time() > 0) {
+        
+    }
+
+return false;
+}
+
+static bool three_second() {
+    return false;
+}
+
+static bool six_second() {
+    return false;
+}
+
+static void play_tone() {
+    switch (tone) {
+        case 0:
+        play_raw(MOUNT_POINT "/low-1.pcm");
+        break;
+        case 1:
+        play_raw(MOUNT_POINT "/low-3.pcm");
+        break;
+        case 2:
+        play_raw(MOUNT_POINT "/low-6.pcm");
+        break;
+        case 3:
+        play_raw(MOUNT_POINT "/high-1.pcm");
+        break;
+        case 4:
+        play_raw(MOUNT_POINT "/high-3.pcm");
+        break;
+        case 5:
+        play_raw(MOUNT_POINT "/high-6.pcm");
+        break;
+    }
 }
diff --git a/main/steps/step4.h b/main/steps/step4.h
index fd0bec1..2177a70 100644
--- a/main/steps/step4.h
+++ b/main/steps/step4.h
@@ -1,6 +1,12 @@
 #ifndef STEP_4_H
 #define STEP_4_H
 
+#include <random>
+#include "../drivers/bottom_half.h"
+#include "../drivers/wires.h"
+#include "../drivers/speaker.h"
+#include "../drivers/game_timer.h"
+
 void step4(void);
 
-#endif /* STEP_4_H */
\ No newline at end of file
+#endif /* STEP_4_H */