diff --git a/app/src/main/java/com/listerk/helible/MainActivity.kt b/app/src/main/java/com/listerk/helible/MainActivity.kt
index ad40f42..a8fc630 100644
--- a/app/src/main/java/com/listerk/helible/MainActivity.kt
+++ b/app/src/main/java/com/listerk/helible/MainActivity.kt
@@ -9,12 +9,15 @@ import android.bluetooth.le.ScanResult
 import android.content.Context
 import android.content.Intent
 import android.content.pm.PackageManager
+import android.graphics.drawable.Animatable
 import android.os.Build
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
 import android.os.Handler
 import android.util.Log
+import android.view.View
 import android.widget.Button
+import android.widget.ImageView
 import androidx.annotation.RequiresApi
 import androidx.core.app.ActivityCompat
 import androidx.recyclerview.widget.LinearLayoutManager
@@ -35,10 +38,16 @@ class MainActivity : AppCompatActivity() {
         override fun onScanResult(callbackType: Int, result: ScanResult) {
             super.onScanResult(callbackType, result)
             val bleDevicesView = findViewById<RecyclerView>(R.id.bleDevicesView)
+            val loader = findViewById<ImageView>(R.id.bleDevicesLoader)
             if (result.device.name.isNullOrBlank()) {
                 return
             }
 
+            if (loader.visibility == View.VISIBLE) {
+                (loader.drawable as? Animatable)?.stop()
+                loader.visibility = View.GONE
+            }
+
             var deviceIndex = foundDevices.indexOfFirst { it.address == result.device.address }
             if (deviceIndex < 0) {
                 deviceIndex = foundDevices.size
@@ -60,6 +69,9 @@ class MainActivity : AppCompatActivity() {
             startActivity(intent)
         }
 
+        val loader = findViewById<ImageView>(R.id.bleDevicesLoader)
+        (loader.drawable as? Animatable)?.start()
+
         val bleDevicesView = findViewById<RecyclerView>(R.id.bleDevicesView)
         bleDevicesView.layoutManager = LinearLayoutManager(this)
         bleDevicesView.adapter = BleDeviceAdapter(foundDevices, gotoControlButton)
diff --git a/app/src/main/res/drawable/loader.xml b/app/src/main/res/drawable/loader.xml
new file mode 100644
index 0000000..d3b9eae
--- /dev/null
+++ b/app/src/main/res/drawable/loader.xml
@@ -0,0 +1,72 @@
+<animated-vector
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt">
+  <aapt:attr name="android:drawable">
+    <vector
+        android:name="vector"
+        android:width="60dp"
+        android:height="15dp"
+        android:viewportWidth="40"
+        android:viewportHeight="10">
+      <path
+          android:name="path"
+          android:pathData="M 5 0 C 3.674 0 2.402 0.527 1.464 1.464 C 0.527 2.402 0 3.674 0 5 C 0 6.326 0.527 7.598 1.464 8.536 C 2.402 9.473 3.674 10 5 10 C 6.326 10 7.598 9.473 8.536 8.536 C 9.473 7.598 10 6.326 10 5 C 10 3.674 9.473 2.402 8.536 1.464 C 7.598 0.527 6.326 0 5 0 Z"
+          android:fillColor="?android:textColorPrimary"
+          android:fillAlpha="0"
+          android:strokeWidth="1"/>
+      <path
+          android:name="path_1"
+          android:pathData="M 20 0 C 18.674 0 17.402 0.527 16.464 1.464 C 15.527 2.402 15 3.674 15 5 C 15 6.326 15.527 7.598 16.464 8.536 C 17.402 9.473 18.674 10 20 10 C 21.326 10 22.598 9.473 23.536 8.536 C 24.473 7.598 25 6.326 25 5 C 25 3.674 24.473 2.402 23.536 1.464 C 22.598 0.527 21.326 0 20 0 Z"
+          android:fillColor="?android:textColorPrimary"
+          android:fillAlpha="0"
+          android:strokeWidth="1"/>
+      <path
+          android:name="path_2"
+          android:pathData="M 35 0 C 33.674 0 32.402 0.527 31.464 1.464 C 30.527 2.402 30 3.674 30 5 C 30 6.326 30.527 7.598 31.464 8.536 C 32.402 9.473 33.674 10 35 10 C 36.326 10 37.598 9.473 38.536 8.536 C 39.473 7.598 40 6.326 40 5 C 40 3.674 39.473 2.402 38.536 1.464 C 37.598 0.527 36.326 0 35 0 Z"
+          android:fillColor="?android:textColorPrimary"
+          android:fillAlpha="0"
+          android:strokeWidth="1"/>
+    </vector>
+  </aapt:attr>
+  <target android:name="path">
+    <aapt:attr name="android:animation">
+      <objectAnimator
+          android:propertyName="fillAlpha"
+          android:duration="500"
+          android:valueFrom="0"
+          android:valueTo="1"
+          android:valueType="floatType"
+          android:repeatCount="infinite"
+          android:repeatMode="reverse"
+          android:interpolator="@android:anim/linear_interpolator"/>
+    </aapt:attr>
+  </target>
+  <target android:name="path_1">
+    <aapt:attr name="android:animation">
+      <objectAnimator
+          android:propertyName="fillAlpha"
+          android:startOffset="200"
+          android:duration="500"
+          android:valueFrom="0"
+          android:valueTo="1"
+          android:valueType="floatType"
+          android:repeatCount="infinite"
+          android:repeatMode="reverse"
+          android:interpolator="@android:anim/linear_interpolator"/>
+    </aapt:attr>
+  </target>
+  <target android:name="path_2">
+    <aapt:attr name="android:animation">
+      <objectAnimator
+          android:propertyName="fillAlpha"
+          android:startOffset="400"
+          android:duration="500"
+          android:valueFrom="0"
+          android:valueTo="1"
+          android:valueType="floatType"
+          android:repeatCount="infinite"
+          android:repeatMode="reverse"
+          android:interpolator="@android:anim/linear_interpolator"/>
+    </aapt:attr>
+  </target>
+</animated-vector>
diff --git a/app/src/main/res/drawable/signal_icon1.xml b/app/src/main/res/drawable/signal_icon1.xml
index 4ff4532..2558b32 100644
--- a/app/src/main/res/drawable/signal_icon1.xml
+++ b/app/src/main/res/drawable/signal_icon1.xml
@@ -1,4 +1,15 @@
 <?xml version="1.0" encoding="utf-8"?>
 <vector xmlns:android="http://schemas.android.com/apk/res/android" android:width="24dp" android:height="24dp" android:viewportWidth="500" android:viewportHeight="500">
-    <path android:fillColor="?android:textColorPrimary" android:pathData="M 15 340 L 80 340 Q 95 340 95 355 L 95 485 Q 95 500 80 500 L 15 500 Q 0 500 0 485 L 0 355 Q 0 340 15 340 Z"/>
+    <path
+        android:fillColor="?android:colorPrimary"
+        android:pathData="M 15 340 L 80 340 Q 95 340 95 355 L 95 485 Q 95 500 80 500 L 15 500 Q 0 500 0 485 L 0 355 Q 0 340 15 340 Z" />
+    <path
+        android:fillColor="?android:colorButtonNormal"
+        android:pathData="M 150 220 L 215 220 Q 230 220 230 235 L 230 485 Q 230 500 215 500 L 150 500 Q 135 500 135 485 L 135 235 Q 135 220 150 220 Z" />
+    <path
+        android:fillColor="?android:colorButtonNormal"
+        android:pathData="M 285 120 L 350 120 Q 365 120 365 135 L 365 485 Q 365 500 350 500 L 285 500 Q 270 500 270 485 L 270 135 Q 270 120 285 120 Z" />
+    <path
+        android:fillColor="?android:colorButtonNormal"
+        android:pathData="M 420 0 L 485 0 Q 500 0 500 15 L 500 485 Q 500 500 485 500 L 420 500 Q 405 500 405 485 L 405 15 Q 405 0 420 0 Z" />
 </vector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/signal_icon2.xml b/app/src/main/res/drawable/signal_icon2.xml
index 419d49a..a5aaa00 100644
--- a/app/src/main/res/drawable/signal_icon2.xml
+++ b/app/src/main/res/drawable/signal_icon2.xml
@@ -6,9 +6,15 @@
     android:viewportHeight="500">
 
     <path
-        android:fillColor="?android:textColorPrimary"
+        android:fillColor="?android:colorPrimary"
         android:pathData="M 15 340 L 80 340 Q 95 340 95 355 L 95 485 Q 95 500 80 500 L 15 500 Q 0 500 0 485 L 0 355 Q 0 340 15 340 Z" />
     <path
-        android:fillColor="?android:textColorPrimary"
+        android:fillColor="?android:colorPrimary"
         android:pathData="M 150 220 L 215 220 Q 230 220 230 235 L 230 485 Q 230 500 215 500 L 150 500 Q 135 500 135 485 L 135 235 Q 135 220 150 220 Z" />
+    <path
+        android:fillColor="?android:colorButtonNormal"
+        android:pathData="M 285 120 L 350 120 Q 365 120 365 135 L 365 485 Q 365 500 350 500 L 285 500 Q 270 500 270 485 L 270 135 Q 270 120 285 120 Z" />
+    <path
+        android:fillColor="?android:colorButtonNormal"
+        android:pathData="M 420 0 L 485 0 Q 500 0 500 15 L 500 485 Q 500 500 485 500 L 420 500 Q 405 500 405 485 L 405 15 Q 405 0 420 0 Z" />
 </vector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/signal_icon3.xml b/app/src/main/res/drawable/signal_icon3.xml
index baa4222..ca6b1ce 100644
--- a/app/src/main/res/drawable/signal_icon3.xml
+++ b/app/src/main/res/drawable/signal_icon3.xml
@@ -6,12 +6,15 @@
     android:viewportHeight="500">
 
     <path
-        android:fillColor="?android:textColorPrimary"
+        android:fillColor="?android:colorPrimary"
         android:pathData="M 15 340 L 80 340 Q 95 340 95 355 L 95 485 Q 95 500 80 500 L 15 500 Q 0 500 0 485 L 0 355 Q 0 340 15 340 Z" />
     <path
-        android:fillColor="?android:textColorPrimary"
+        android:fillColor="?android:colorPrimary"
         android:pathData="M 150 220 L 215 220 Q 230 220 230 235 L 230 485 Q 230 500 215 500 L 150 500 Q 135 500 135 485 L 135 235 Q 135 220 150 220 Z" />
     <path
-        android:fillColor="?android:textColorPrimary"
+        android:fillColor="?android:colorPrimary"
         android:pathData="M 285 120 L 350 120 Q 365 120 365 135 L 365 485 Q 365 500 350 500 L 285 500 Q 270 500 270 485 L 270 135 Q 270 120 285 120 Z" />
+    <path
+        android:fillColor="?android:colorButtonNormal"
+        android:pathData="M 420 0 L 485 0 Q 500 0 500 15 L 500 485 Q 500 500 485 500 L 420 500 Q 405 500 405 485 L 405 15 Q 405 0 420 0 Z" />
 </vector>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/signal_icon4.xml b/app/src/main/res/drawable/signal_icon4.xml
index 03fc192..932ac4b 100644
--- a/app/src/main/res/drawable/signal_icon4.xml
+++ b/app/src/main/res/drawable/signal_icon4.xml
@@ -6,15 +6,15 @@
     android:viewportHeight="500">
 
     <path
-        android:fillColor="?android:textColorPrimary"
+        android:fillColor="?android:colorPrimary"
         android:pathData="M 15 340 L 80 340 Q 95 340 95 355 L 95 485 Q 95 500 80 500 L 15 500 Q 0 500 0 485 L 0 355 Q 0 340 15 340 Z" />
     <path
-        android:fillColor="?android:textColorPrimary"
+        android:fillColor="?android:colorPrimary"
         android:pathData="M 150 220 L 215 220 Q 230 220 230 235 L 230 485 Q 230 500 215 500 L 150 500 Q 135 500 135 485 L 135 235 Q 135 220 150 220 Z" />
     <path
-        android:fillColor="?android:textColorPrimary"
+        android:fillColor="?android:colorPrimary"
         android:pathData="M 285 120 L 350 120 Q 365 120 365 135 L 365 485 Q 365 500 350 500 L 285 500 Q 270 500 270 485 L 270 135 Q 270 120 285 120 Z" />
     <path
-        android:fillColor="?android:textColorPrimary"
+        android:fillColor="?android:colorPrimary"
         android:pathData="M 420 0 L 485 0 Q 500 0 500 15 L 500 485 Q 500 500 485 500 L 420 500 Q 405 500 405 485 L 405 15 Q 405 0 420 0 Z" />
 </vector>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index da61d44..8eb95a2 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -25,9 +25,18 @@
         app:layout_constraintTop_toBottomOf="@id/devicesTitle"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
-        android:layout_marginTop="4dp"
+        android:layout_marginTop="12dp"
         tools:listitem="@layout/item_ble_device" />
 
+    <ImageView
+        android:id="@+id/bleDevicesLoader"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:src="@drawable/loader"
+        app:layout_constraintTop_toBottomOf="@id/bleDevicesView"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"/>
+
     <Button
         android:id="@+id/gotoControlButton"
         android:layout_width="wrap_content"
@@ -36,6 +45,7 @@
         android:enabled="false"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintBottom_toBottomOf="parent" />
+        app:layout_constraintBottom_toBottomOf="parent"
+        android:layout_marginBottom="12dp"/>
 
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/item_ble_device.xml b/app/src/main/res/layout/item_ble_device.xml
index a95fa54..9756894 100644
--- a/app/src/main/res/layout/item_ble_device.xml
+++ b/app/src/main/res/layout/item_ble_device.xml
@@ -17,6 +17,7 @@
         app:layout_constraintTop_toTopOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         android:textSize="18sp"
+        android:textStyle="bold"
         android:text="Helicopter BLE" />
 
     <TextView