looping_background.gd

extends Node2D

var off_screen
var resetpos
var speed = -100
# Called when the node enters the scene tree for the first time.
func _ready():
	off_screen = $BackgroundEmpty.position.x * -1
	resetpos = $BackgroundEmpty2.position.x

# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta):
	$BackgroundEmpty.position.x += speed * delta
	$BackgroundEmpty2.position.x += speed * delta
	if $BackgroundEmpty.position.x <= off_screen:
		$BackgroundEmpty.position.x = resetpos
	if $BackgroundEmpty2.position.x <= off_screen:
		$BackgroundEmpty2.position.x = resetpos

looping_background.tscn

[gd_scene load_steps=3 format=3 uid="uid://b44uioaarp3k1"]

[ext_resource type="Script" path="res://looping_background.gd" id="1_mf8hi"]
[ext_resource type="Texture2D" uid="uid://8rb07mkgsb4e" path="res://backgroundEmpty.png" id="2_bh0k8"]

[node name="looping_background" type="Node2D"]
script = ExtResource("1_mf8hi")

[node name="BackgroundEmpty" type="Sprite2D" parent="."]
position = Vector2(576, 324)
scale = Vector2(1.125, 0.632813)
texture = ExtResource("2_bh0k8")

[node name="BackgroundEmpty2" type="Sprite2D" parent="."]
position = Vector2(1728, 324)
scale = Vector2(1.125, 0.632813)
texture = ExtResource("2_bh0k8")

project.godot

; Engine configuration file.
; It's best edited using the editor UI and not directly,
; since the parameters that go here are not all obvious.
;
; Format:
;   [section] ; section goes between []
;   param=value ; assign values to parameters

config_version=5

[application]

config/name="scrolling background"
run/main_scene="res://looping_background.tscn"
config/features=PackedStringArray("4.0", "GL Compatibility")
config/icon="res://icon.svg"

[rendering]

renderer/rendering_method="gl_compatibility"
renderer/rendering_method.mobile="gl_compatibility"

save.webm