diff --git a/kubi/shaders/gui/progress.frag b/kubi/shaders/gui/progress.frag
new file mode 100644
index 0000000..1474e79
--- /dev/null
+++ b/kubi/shaders/gui/progress.frag
@@ -0,0 +1,15 @@
+#version 150 core
+
+in vec2 v_uv;
+out vec4 out_color;
+uniform float progress;
+uniform vec4 color;
+uniform vec4 bg_color;
+
+void main() {
+  if (v_uv.x <= progress) {
+    out_color = color;
+  } else {
+    out_color = bg_color;
+  }
+}
diff --git a/kubi/shaders/gui/progress.vert b/kubi/shaders/gui/progress.vert
new file mode 100644
index 0000000..82ad5d7
--- /dev/null
+++ b/kubi/shaders/gui/progress.vert
@@ -0,0 +1,13 @@
+#version 150 core
+
+in vec2 position;
+in vec2 uv;
+out vec2 v_uv;
+uniform vec2 ui_scale;
+uniform vec2 element_position;
+uniform vec2 element_size;
+
+void main() {
+  v_uv = uv;
+  gl_Position = vec4(ui_scale * (element_position + (position * element_size)), 0.0, 1.0);
+}