User can hold bluescreen so it stops

animation_player.gd

@@ -0,0 +1,10 @@
+extends AnimationPlayer
+
+
+func _process(delta):
+	if Input.is_action_just_pressed("hold"):
+		# holds the percentage animation / plays it again when currently holded
+		if is_playing():
+			stop(false)
+		else:
+			play()

main.tscn

@@ -1,8 +1,9 @@
-[gd_scene load_steps=10 format=2]
+[gd_scene load_steps=11 format=2]
 
 [ext_resource path="res://Roboto-Regular.ttf" type="DynamicFontData" id=1]
 [ext_resource path="res://qrcode.png" type="Texture" id=2]
 [ext_resource path="res://main.gd" type="Script" id=3]
+[ext_resource path="res://animation_player.gd" type="Script" id=4]
 
 [sub_resource type="DynamicFont" id=2]
 size = 70
@@ -155,5 +156,6 @@ stretch_mode = 6
 autoplay = "start"
 anims/RESET = SubResource( 6 )
 anims/start = SubResource( 5 )
+script = ExtResource( 4 )
 
 [connection signal="gui_input" from="." to="." method="_on_Control_gui_input"]

project.godot

@@ -21,6 +21,14 @@ config/icon="res://icon.png"
 
 window/size/fullscreen=true
 
+[input]
+
+hold={
+"deadzone": 0.5,
+"events": [ Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"alt":false,"shift":false,"control":false,"meta":false,"command":false,"pressed":false,"scancode":72,"physical_scancode":0,"unicode":0,"echo":false,"script":null)
+ ]
+}
+
 [physics]
 
 common/enable_pause_aware_picking=true