diff --git a/app/src/main/java/com/example/hpostesting/presentation/hemocube/HemoCubeFragment.kt b/app/src/main/java/com/example/hpostesting/presentation/hemocube/HemoCubeFragment.kt
index 8aa857a..b0cd9fe 100644
--- a/app/src/main/java/com/example/hpostesting/presentation/hemocube/HemoCubeFragment.kt
+++ b/app/src/main/java/com/example/hpostesting/presentation/hemocube/HemoCubeFragment.kt
@@ -4,6 +4,7 @@ import android.annotation.SuppressLint
 import android.content.Context
 import android.content.Intent
 import android.content.SharedPreferences
+import android.graphics.Color
 import android.os.Bundle
 import android.util.Log
 import android.view.LayoutInflater
@@ -111,11 +112,25 @@ class HemoCubeFragment : Fragment() {
         binding.nameEditText.visibility = View.GONE
         binding.tvTitle.visibility = View.GONE
         binding.btnGo.visibility = View.GONE
-        binding.btnPlacebuffer.visibility = View.GONE
+//        binding.btnPlacebuffer.visibility = View.GONE
 
         binding.tvName.text = "Name: ${testDetails?.name}\n ID: ${testDetails?._id}"
         binding.tvSubtitle4.text = "Config"
 
+
+        if (isBufferValueAvailable() || !Constants.BLANK_EVERY_TEST) {
+            binding.btnPlacebuffer.apply {
+                setBackgroundColor(Color.GREEN) // Set button background color to green
+                text = "Fresh Buffer" // Change button text to "Buffer Exists"
+            }
+        }else if(!isBufferValueAvailable() || Constants.BLANK_EVERY_TEST){
+            binding.btnPlacebuffer.apply {
+                setBackgroundColor(Color.RED) // Set button background color to green
+                text = "No Buffer" // Change button text to "Buffer Exists"
+            }
+        }
+
+
         binding.btnSamplestart.setOnClickListener {
             if(checkCuvette){
                 activity?.runOnUiThread {
@@ -123,7 +138,7 @@ class HemoCubeFragment : Fragment() {
 //                binding.tvSubtitle4.text = "Sample Started"
                 }
                 startSampleProcess()
-                it.visibility = View.GONE
+//                it.visibility = View.GONE
             }else{
                 checkCuvettePresence()
             }
@@ -134,18 +149,20 @@ class HemoCubeFragment : Fragment() {
         }
         binding.btnPlacebuffer.setOnClickListener {
             if(checkCuvette){
-                if (isBufferValueAvailable() || !Constants.BLANK_EVERY_TEST) {
-                    showBufferAlertDialog()
-                } else {
+
+                startBufferProcess()
+//                if (isBufferValueAvailable() || !Constants.BLANK_EVERY_TEST) {
+////                    showBufferAlertDialog()
+//                } else {
                     activity?.runOnUiThread {
                         binding.tvSubtitle4.visibility = View.VISIBLE
 //                    binding.tvSubtitle4.text = "Buffer Started"
                     }
 
                     //  checkAndStartProcess()
-                    startBufferProcess()
-                    it.visibility = View.GONE
-                }
+
+//                    it.visibility = View.GONE
+//                }
             }else{
                 checkCuvettePresence()
             }
@@ -327,7 +344,7 @@ class HemoCubeFragment : Fragment() {
 
                 override fun onClickPositiveButton() {
                     activity?.runOnUiThread {
-                        binding.btnPlacebuffer.visibility = View.GONE
+//                        binding.btnPlacebuffer.visibility = View.GONE
                         binding.btnSamplestart.visibility = View.VISIBLE
                         binding.tvSubtitle4.text = getString(R.string.place_sample)
                     }
@@ -432,7 +449,6 @@ class HemoCubeFragment : Fragment() {
                 this.testStatusCode = TestStatus.EPROM_ADC_RETRIEVAL_COMPLETED.code
                 hemoCubeViewModel.messages.postValue("EPROM ADC Loaded")
                 //checkCuvettePresence()
-                showStartBufferButton()
             }
 
             resultData.contains("#CIN") && this.testStatusCode < TestStatus.CUVETTE_PRESENT.code -> {
@@ -455,7 +471,8 @@ class HemoCubeFragment : Fragment() {
                 this.testStatusCode = TestStatus.BUFFER_COMPLETED.code
                 activity?.runOnUiThread {
                     binding.tvSubtitle4.text = getString(R.string.buffer_completed)
-                    binding.btnSamplestart.visibility = View.VISIBLE
+//                    binding.btnSamplestart.visibility = View.VISIBLE
+                    binding.btnPlacebuffer.visibility = View.GONE
                 }
                 checkCuvette = false
             }
@@ -465,11 +482,15 @@ class HemoCubeFragment : Fragment() {
                 activity?.runOnUiThread {
                     binding.tvSubtitle4.text = getString(R.string.sample_started)
                     binding.btnSamplestart.visibility = View.GONE
+                    binding.btnPlacebuffer.visibility = View.GONE
                 }
             }
 
             (resultData.contains("#SC") || resultData.contains("#SC1")) && this.testStatusCode < TestStatus.SAMPLE_COMPLETED.code -> {
                 this.testStatusCode = TestStatus.SAMPLE_COMPLETED.code
+                activity?.runOnUiThread {
+                    binding.btnSamplestart.visibility = View.GONE
+                }
                 hemoCubeViewModel.messages.postValue(
                     getString(R.string.sample_completed) + "\n" + getString(R.string.gathering_data)
                 )
@@ -628,7 +649,7 @@ class HemoCubeFragment : Fragment() {
 
     private fun showRetryButtonForCuvette() {
         activity?.runOnUiThread {
-            binding.btnPlacebuffer.visibility = View.GONE
+//            binding.btnPlacebuffer.visibility = View.GONE
             binding.btnRetryCheckCuvette.visibility = View.VISIBLE
         }
     }
@@ -726,6 +747,15 @@ class HemoCubeFragment : Fragment() {
 //        hemoCubeViewModel.messages.postValue(getString(R.string.start))
     }
 
+    fun showStartSampleButton() {
+        activity?.runOnUiThread {
+            binding.btnRetryCheckCuvette.visibility = View.GONE
+
+            binding.btnSamplestart.visibility = View.VISIBLE
+        }
+//        hemoCubeViewModel.messages.postValue(getString(R.string.start))
+    }
+
     fun extractV1HardwareId(input: String): String? {
         val regex = Regex("SN (\\S+)")
         val matchResult = regex.find(input)
@@ -1193,11 +1223,9 @@ class HemoCubeFragment : Fragment() {
     }
     private fun startBufferProcess() {
         hemoCubeViewModel.progressBar.postValue(true)
-
-        activity?.runOnUiThread {
-            binding.btnPlacebuffer.visibility = View.GONE
-        }
-
+//        activity?.runOnUiThread {
+//            binding.btnPlacebuffer.visibility = View.GONE
+//        }
         (activity as HemocubeActivity).mService.sendAndListenToHemoCube(HemoCubeCommands.START_BUFFER_COMMAND,
             object : UsbServiceListener {
                 override fun onUsbRead(data: ByteArray?) {}
@@ -1209,16 +1237,17 @@ class HemoCubeFragment : Fragment() {
     }
 
     private fun startSampleProcess() {
-        hemoCubeViewModel.progressBar.postValue(true)
+            hemoCubeViewModel.progressBar.postValue(true)
 
-        (activity as HemocubeActivity).mService.sendAndListenToHemoCube(HemoCubeCommands.START_SAMPLE,
-            object : UsbServiceListener {
-                override fun onUsbRead(data: ByteArray?) {}
+            (activity as HemocubeActivity).mService.sendAndListenToHemoCube(HemoCubeCommands.START_SAMPLE,
+                object : UsbServiceListener {
+                    override fun onUsbRead(data: ByteArray?) {}
+
+                    override fun onUsbError(e: Exception?) {
+                        hemoCubeViewModel.progressBar.postValue(false)
+                    }
+                })
 
-                override fun onUsbError(e: Exception?) {
-                    hemoCubeViewModel.progressBar.postValue(false)
-                }
-            })
     }
 
     private fun sendFirstGainCommand() {
diff --git a/app/src/main/res/layout/fragment_hemo_cube_reference.xml b/app/src/main/res/layout/fragment_hemo_cube_reference.xml
index b5a119f..921a6d6 100644
--- a/app/src/main/res/layout/fragment_hemo_cube_reference.xml
+++ b/app/src/main/res/layout/fragment_hemo_cube_reference.xml
@@ -155,18 +155,6 @@
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@id/tv_subtitle4">
-            <Button
-                android:visibility="gone"
-                android:id="@+id/btn_samplestart"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_marginHorizontal="16dp"
-                android:layout_marginTop="24dp"
-                android:clickable="false"
-                android:text="@string/Start_Sample"
-                android:textColor="@color/white"
-                app:cornerRadius="16dp"
-              />
 
             <Button
                 android:id="@+id/btn_placebuffer"
@@ -179,6 +167,18 @@
                 android:text="@string/place_buffer"
                 android:textColor="@color/white"
                 app:cornerRadius="16dp"
+                />
+
+            <Button
+                android:id="@+id/btn_samplestart"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginHorizontal="16dp"
+                android:layout_marginTop="5dp"
+                android:clickable="false"
+                android:text="@string/Start_Sample"
+                android:textColor="@color/white"
+                app:cornerRadius="16dp"
               />
 
             <Button
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 6e09b95..2f3399f 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -118,7 +118,7 @@
     <string name="Firefox">Firefox</string>
     <string name="Files">Files</string>
     <string name="deviceinfo">Device Information</string>
-    <string name="place_buffer">Start</string>
+    <string name="place_buffer">Start Buffer</string>
     <string name="Start_Sample">Start Sample</string>
     <string name="new_kit">New Kit</string>
     <string name="new_buffer">New Buffer</string>
@@ -276,6 +276,6 @@
     <string name="action_activity">Activities</string>
     <string name="check_cuvette">Checking cuvette presence</string>
     <string name="cuvette_present">Cuvette present , you can start the test</string>
-    <string name="cuvette_absent">Cuvette is absent , please place the cuvette</string>
-    <string name="retry">Retry</string>
+    <string name="cuvette_absent">Cuvette is absent , please place the cuvette and retry again</string>
+    <string name="retry">Retry again</string>
 </resources>
\ No newline at end of file