diff --git a/plugin.gd b/plugin.gd
index 8230598..53758f0 100644
--- a/plugin.gd
+++ b/plugin.gd
@@ -1,3 +1,19 @@
+# STAROPENSOURCE UI SOURCE FILE
+# Copyright (c) 2024 The StarOpenSource Project & Contributors
+# Licensed under the GNU Affero General Public License v3
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+# 
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
 @tool
 extends EditorPlugin
 
diff --git a/scenesrc/SuiProgressBar.tscn b/scenesrc/SuiProgressBar.tscn
new file mode 100644
index 0000000..743451c
--- /dev/null
+++ b/scenesrc/SuiProgressBar.tscn
@@ -0,0 +1,25 @@
+[gd_scene load_steps=3 format=3 uid="uid://7v3lokrljsjw"]
+
+[ext_resource type="Script" path="res://addons/SUI/src/SuiProgressBar.gd" id="1_t211g"]
+[ext_resource type="Theme" uid="uid://bfln8p0ov8enx" path="res://addons/SUI/themes/ProgressBar.tres" id="2_rvtjx"]
+
+[node name="SuiProgressBar" type="Control"]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+offset_right = -1063.0
+offset_bottom = -762.0
+grow_horizontal = 2
+grow_vertical = 2
+script = ExtResource("1_t211g")
+editor_process = true
+runtime_process = true
+
+[node name="Bar" type="ProgressBar" parent="."]
+layout_mode = 0
+offset_right = 377.0
+offset_bottom = 48.0
+theme = ExtResource("2_rvtjx")
+theme_override_font_sizes/font_size = 25
+value = 50.0
diff --git a/src/SuiBaseClass.gd b/src/SuiBaseClass.gd
index 9f74d32..4fb47ef 100644
--- a/src/SuiBaseClass.gd
+++ b/src/SuiBaseClass.gd
@@ -1,3 +1,19 @@
+# STAROPENSOURCE UI SOURCE FILE
+# Copyright (c) 2024 The StarOpenSource Project & Contributors
+# Licensed under the GNU Affero General Public License v3
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+# 
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
 @tool
 extends Control
 class_name SuiBaseClass
diff --git a/src/SuiHeader.gd b/src/SuiHeader.gd
index 6830651..82134d7 100644
--- a/src/SuiHeader.gd
+++ b/src/SuiHeader.gd
@@ -1,3 +1,19 @@
+# STAROPENSOURCE UI SOURCE FILE
+# Copyright (c) 2024 The StarOpenSource Project & Contributors
+# Licensed under the GNU Affero General Public License v3
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+# 
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
 @tool
 extends SuiBaseClass
 
diff --git a/src/SuiIconButton.gd b/src/SuiIconButton.gd
index 2649443..aaa682f 100644
--- a/src/SuiIconButton.gd
+++ b/src/SuiIconButton.gd
@@ -1,3 +1,19 @@
+# STAROPENSOURCE UI SOURCE FILE
+# Copyright (c) 2024 The StarOpenSource Project & Contributors
+# Licensed under the GNU Affero General Public License v3
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+# 
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
 @tool
 extends SuiBaseClass
 
@@ -85,5 +101,5 @@ func update_element() -> void:
 	$Icon.axis_stretch_horizontal = as_horizontal
 	$Icon.axis_stretch_vertical = as_vertical
 
-func update_pressed_state(is_pressed: bool) -> void:
+func update_pressed(is_pressed: bool) -> void:
 	$Button.button_pressed = is_pressed
diff --git a/src/SuiProgressBar.gd b/src/SuiProgressBar.gd
new file mode 100644
index 0000000..9fbf8b1
--- /dev/null
+++ b/src/SuiProgressBar.gd
@@ -0,0 +1,53 @@
+# STAROPENSOURCE UI SOURCE FILE
+# Copyright (c) 2024 The StarOpenSource Project & Contributors
+# Licensed under the GNU Affero General Public License v3
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+# 
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+@tool
+extends SuiBaseClass
+
+@export_category("Base Configuration")
+## The size the percentage text should have.
+@export var font_size: int = 25
+@export_subgroup("ProgressBar")
+## The minimum value this progress bar can display.
+@export var minimum_value: float = 0.0
+## The maximum value this progress bar can display.
+@export var maximum_value: float = 100.0
+## Forwarded from the internal [ProgressBar]. Will be overriden with the internal bar's value, any changes to this variable will not be reflected (except during [method _ready]).
+@export var value: float = 50.0
+## Determines if [code]value[/code] should be rounded to the nearest integer.
+@export var rounded: bool = false
+## See [member Range.exp_edit].
+@export var exponential: bool = false
+
+func _ready() -> void:
+	super()
+	if !in_editor(): $Bar.value = value
+
+func update_element() -> void:
+	# Update sizes
+	$Bar.size = size
+	
+	# Update ProgressBar stuff
+	$Bar.min_value = minimum_value
+	$Bar.max_value = maximum_value
+	$Bar.rounded = rounded
+	$Bar.exp_edit = exponential
+	if in_editor(): $Bar.value = value
+	else: value = $Bar.value
+	$Bar.add_theme_font_size_override("font_size", font_size)
+
+func update_value(value_new: float) -> void:
+	$Bar.value = value_new
diff --git a/src/SuiScroller.gd b/src/SuiScroller.gd
index c3f786b..f2a4a08 100644
--- a/src/SuiScroller.gd
+++ b/src/SuiScroller.gd
@@ -1,3 +1,19 @@
+# STAROPENSOURCE UI SOURCE FILE
+# Copyright (c) 2024 The StarOpenSource Project & Contributors
+# Licensed under the GNU Affero General Public License v3
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+# 
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
 @tool
 extends SuiBaseClass
 
diff --git a/src/SuiText.gd b/src/SuiText.gd
index 91bcda4..703dd19 100644
--- a/src/SuiText.gd
+++ b/src/SuiText.gd
@@ -1,3 +1,19 @@
+# STAROPENSOURCE UI SOURCE FILE
+# Copyright (c) 2024 The StarOpenSource Project & Contributors
+# Licensed under the GNU Affero General Public License v3
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+# 
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
 @tool
 extends SuiBaseClass
 
diff --git a/src/SuiTextButton.gd b/src/SuiTextButton.gd
index 2022c81..746c767 100644
--- a/src/SuiTextButton.gd
+++ b/src/SuiTextButton.gd
@@ -1,3 +1,19 @@
+# STAROPENSOURCE UI SOURCE FILE
+# Copyright (c) 2024 The StarOpenSource Project & Contributors
+# Licensed under the GNU Affero General Public License v3
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+# 
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
 @tool
 extends SuiBaseClass
 
@@ -53,5 +69,5 @@ func update_element() -> void:
 	$Text.add_theme_font_size_override("bold_italics_font_size", font_size)
 	$Text.add_theme_font_size_override("mono_font_size", font_size)
 
-func update_pressed_state(is_pressed: bool) -> void:
+func update_pressed(is_pressed: bool) -> void:
 	$Button.button_pressed = is_pressed
diff --git a/src/SuiTypes.gd b/src/SuiTypes.gd
index 7642980..a0f01c2 100644
--- a/src/SuiTypes.gd
+++ b/src/SuiTypes.gd
@@ -1,3 +1,19 @@
+# STAROPENSOURCE UI SOURCE FILE
+# Copyright (c) 2024 The StarOpenSource Project & Contributors
+# Licensed under the GNU Affero General Public License v3
+# 
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+# 
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
 extends Node
 class_name SuiTypes
 
diff --git a/themes/ProgressBar.tres b/themes/ProgressBar.tres
new file mode 100644
index 0000000..cc22ff9
--- /dev/null
+++ b/themes/ProgressBar.tres
@@ -0,0 +1,23 @@
+[gd_resource type="Theme" load_steps=4 format=3 uid="uid://bfln8p0ov8enx"]
+
+[ext_resource type="FontFile" uid="uid://d3cdnrnmplqa2" path="res://addons/SUI/fonts/Jost/Jost-Medium.ttf" id="1_5nv4j"]
+
+[sub_resource type="StyleBoxFlat" id="StyleBoxFlat_nesmb"]
+bg_color = Color(0.997878, 0.337467, 0.369875, 1)
+corner_radius_top_left = 8
+corner_radius_top_right = 8
+corner_radius_bottom_right = 8
+corner_radius_bottom_left = 8
+
+[sub_resource type="StyleBoxFlat" id="StyleBoxFlat_1awnp"]
+bg_color = Color(0.839216, 0.0196078, 0.196078, 1)
+corner_radius_top_left = 8
+corner_radius_top_right = 8
+corner_radius_bottom_right = 8
+corner_radius_bottom_left = 8
+
+[resource]
+ProgressBar/colors/font_color = Color(1, 1, 1, 1)
+ProgressBar/fonts/font = ExtResource("1_5nv4j")
+ProgressBar/styles/background = SubResource("StyleBoxFlat_nesmb")
+ProgressBar/styles/fill = SubResource("StyleBoxFlat_1awnp")