diff --git a/applications/coreglitch_demo_0/coreglitch_demo_0.c b/applications/coreglitch_demo_0/coreglitch_demo_0.c
new file mode 100644
index 00000000..ee682378
--- /dev/null
+++ b/applications/coreglitch_demo_0/coreglitch_demo_0.c
@@ -0,0 +1,77 @@
+#include "flipper.h"
+#include "u8g2/u8g2.h"
+
+extern TIM_HandleTypeDef htim5;
+
+void coreglitch_demo_0(void* p) {
+    FuriRecordSubscriber* log = get_default_log();
+
+    fuprintf(log, "coreglitch demo!\n");
+
+    // open record
+    FuriRecordSubscriber* fb_record = furi_open(
+        "u8g2_fb", false, false, NULL, NULL, NULL
+    );
+
+    if(fb_record == NULL) {
+        fuprintf(log, "[widget] cannot create fb record\n");
+        furiac_exit(NULL);
+    }
+
+    float notes[] = {
+        0.0,
+        330.0,
+        220.0,
+        0.0,
+        110.0 + 55.0,
+        440.0,
+        330.0,
+        55.0,
+    };
+
+    float scales[] = {
+        1.0,
+        1.5,
+        0.75,
+        0.8
+    };
+
+    uint8_t cnt = 0;
+
+    while(1) {
+
+        for(size_t note_idx = 0; note_idx < 400; note_idx++) {
+            float scale = scales[((cnt + note_idx)/16) % 4];
+
+            float freq = notes[(note_idx + cnt / 2) % 8] * scale;
+            float width = 0.001 + 0.05 * (note_idx % (cnt/7 + 5));
+
+            if(note_idx % 8 == 0) {
+                freq = 0;
+            }
+
+            // TODO get sound from FURI
+            pwm_set(width, freq, &htim5, TIM_CHANNEL_4);
+            // delay(1);
+
+            cnt++;
+
+            
+            u8g2_t* fb = furi_take(fb_record);
+            if(fb != NULL) {
+                u8g2_SetDrawColor(fb, 0);
+                u8g2_DrawBox(fb, 0, 0, 120, 30);
+
+                u8g2_SetFont(fb, u8g2_font_6x10_mf);
+                u8g2_SetDrawColor(fb, 1);
+                u8g2_SetFontMode(fb, 1);
+                char buf[64];
+                sprintf(buf, "freq: %d Hz", (uint32_t)freq);
+                u8g2_DrawStr(fb, 2 + width * 20, 12 + freq / 100, buf);
+            }
+            furi_commit(fb_record);
+
+            delay(100);
+        }
+    }
+}
diff --git a/applications/display-u8g2/display-u8g2.c b/applications/display-u8g2/display-u8g2.c
index 72f8a2b0..02c8d447 100644
--- a/applications/display-u8g2/display-u8g2.c
+++ b/applications/display-u8g2/display-u8g2.c
@@ -169,7 +169,7 @@ void display_u8g2(void* p) {
 
     while(1) {
         // wait for event
-        if(xSemaphoreTake(update, 1000) == pdTRUE) {
+        if(xSemaphoreTake(update, 10000) == pdTRUE) {
             HAL_GPIO_WritePin(DISPLAY_BACKLIGHT_GPIO_Port, DISPLAY_BACKLIGHT_Pin, GPIO_PIN_SET);
 
             u8g2_t* u8g2 = (u8g2_t*)furi_take(fb_record);
diff --git a/applications/startup.h b/applications/startup.h
index 59308b84..ebabc9c8 100644
--- a/applications/startup.h
+++ b/applications/startup.h
@@ -20,11 +20,15 @@ void display_u8g2(void* p);
 
 void u8g2_example(void* p);
 
+void coreglitch_demo_0(void* p);
+
 const FlipperStartupApp FLIPPER_STARTUP[] = {
     #ifndef TEST
     {.app = display_u8g2, .name = "display_u8g2"},
     {.app = u8g2_example, .name = "u8g2_example"},
     #endif
+
+    // {.app = coreglitch_demo_0, .name = "coreglitch_demo_0"},
     
     #ifdef TEST
     {.app = flipper_test_app, .name = "test app"},
diff --git a/target_f2/Makefile b/target_f2/Makefile
index 27d95bb6..edc6c7be 100644
--- a/target_f2/Makefile
+++ b/target_f2/Makefile
@@ -171,6 +171,8 @@ endif
 
 # User application
 
+C_SOURCES += ../applications/coreglitch_demo_0/coreglitch_demo_0.c
+
 # Add C_SOURCES +=, C_DEFS += or CPP_SOURCES += here
 
 #######################################