diff --git a/lib/Exd/DeviceToBluetooth.pm b/lib/Exd/DeviceToBluetooth.pm
index f1510dd..f261f11 100644
--- a/lib/Exd/DeviceToBluetooth.pm
+++ b/lib/Exd/DeviceToBluetooth.pm
@@ -26,6 +26,7 @@ has port => (
 has _guts_device => ( is => 'rw' );
 
 has _tempdir => ( is => 'rw', );
+has _bluetooth => ( is => 'lazy' );
 
 sub _device($self) {
     if ( !defined $self->_guts_device ) {
@@ -59,10 +60,14 @@ sub lf($self) {
     $self->_device->lf;
 }
 
-sub _obj($self) {
+sub _build__bluetooth($self) {
     my $obj = Net::Bluetooth->newsocket('RFCOMM');
     $self->_try_to_connect($obj);
-    return $obj;
+    return $obj; 
+}
+
+sub _obj($self) {
+    return $self->_bluetooth;
 }
 
 sub print($self) {
@@ -73,6 +78,7 @@ sub print($self) {
     my $fh = $obj->perlfh;
     print $fh path( $self->_tempfile )->slurp_raw;
     $fh->flush;
+    close $fh;
 }
 
 sub _try_to_connect($self, $obj, $retries = 3) {
diff --git a/lib/Exd/DeviceToImage.pm b/lib/Exd/DeviceToImage.pm
index 33d8bfb..c7640c0 100644
--- a/lib/Exd/DeviceToImage.pm
+++ b/lib/Exd/DeviceToImage.pm
@@ -35,13 +35,13 @@ sub image( $self, $image ) {
     $self->current_image($new_current);
 }
 
-sub lf {
-}
-
 sub print($self) {
     path($self->output_file)->spew_raw($self->current_image->png);
 }
 
+sub lf {
+}
+
 sub serialize($self) {
     my $hash = {%$self};
     $hash->{type} = 'image';
diff --git a/lib/Exd/Gui.pm b/lib/Exd/Gui.pm
index 043ab75..04fc23f 100644
--- a/lib/Exd/Gui.pm
+++ b/lib/Exd/Gui.pm
@@ -201,7 +201,7 @@ sub _on_run_script( $self, $script, $device, $write_to_parent, $verbose = 1 ) {
         eval {
             my $sub =
               eval
-'use v5.40.0; use strict; use warnings; use utf8; use Cairo; use Pango;'
+'use v5.40.0; use strict; use warnings; use utf8; no Carp::Always; use Cairo; use Pango;'
               . $script;
             if ($@) {
                 die $@;
@@ -229,7 +229,15 @@ sub _monitor_run($self) {
         my $buffer      = $execute_log->get_buffer;
         my $begin_iter  = $buffer->get_iter_at_offset(0);
         my $end_iter    = $buffer->get_end_iter;
-        my $text        = <$fh>;
+
+        my $text        = '';
+        $fh->blocking(0);
+        while (my $line = <$fh>) {
+            if (!defined $line) {
+                next;
+            }
+            $text .= $line;
+        }
         return if $text =~ /^\s*$/;
         $buffer->insert( $end_iter, $text, -1 );
     }
@@ -264,6 +272,10 @@ sub _activate($self) {
     $self->_win($win);
     my $box_vertical   = Gtk4::Box->new( 'vertical', 0 );
     my $editor         = Gtk4::Source::View->new;
+    $editor->set_insert_spaces_instead_of_tabs(1);
+    $editor->set_tab_width(4);
+    $editor->set_auto_indent(1);
+    $editor->set_smart_backspace(1);
     my $execute_log    = Gtk4::TextView->new;
     my $run_button     = Gtk4::Button->new_with_label('Run');
     my $preview_button = Gtk4::Button->new_with_label('Preview');
@@ -310,7 +322,7 @@ sub ($printer) {
         ],
         30
     );
-    $printer->print_n_lf(4);
+    $printer->print_n_lf(2);
 
     $printer->print;
 }
@@ -345,6 +357,8 @@ EOF
     $box_editor_preview->append($editor_scroll_window);
     $box_editor_preview->append($preview_scroll_window);
     my $execute_log_window = Gtk4::ScrolledWindow->new;
+    $execute_log_window->set_vexpand(0);
+    $execute_log_window->set_property('height-request', 300);
     my $scroll             = $execute_log_window->get_vadjustment;
     $self->_scroll_log_upper( $scroll->get_upper );
     $scroll->signal_connect(
diff --git a/lib/Exd/Printer.pm b/lib/Exd/Printer.pm
index 7a144aa..63b1910 100644
--- a/lib/Exd/Printer.pm
+++ b/lib/Exd/Printer.pm
@@ -362,9 +362,7 @@ sub print($self) {
 }
 
 sub print_n_lf($self, $n) {
-    for (my $i = 0; $i < $n; $i++) {
-        $self->device->lf;
-    }
+    $self->print_text("\n" x $n, 30);
 }
 
 sub _get_size_text( $self, $cr, $layout, $font, $font_size, $text ) {