i forgot to add the LayerBG header

loader/include/Geode/ui/LayerBG.hpp

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <Geode/DefaultInclude.hpp>
+#include <cocos2d.h>
+
+namespace geode {
+    /**
+     * Creates the usual blue gradient BG for a layer. You should use this over 
+     * creating the sprite manually, as in the future we may provide texture 
+     * packs the ability to override this function.
+     */
+    GEODE_DLL cocos2d::CCSprite* createLayerBG();
+}

loader/src/ui/nodes/LayerBG.cpp

@@ -0,0 +1,18 @@
+#include <Geode/ui/LayerBG.hpp>
+
+USE_GEODE_NAMESPACE();
+
+CCSprite* geode::createLayerBG() {
+    auto winSize = CCDirector::get()->getWinSize();
+
+	auto bg = CCSprite::create("GJ_gradientBG.png");
+	auto bgSize = bg->getTextureRect().size;
+
+	bg->setAnchorPoint({ 0.0f, 0.0f });
+	bg->setScaleX((winSize.width + 10.0f) / bgSize.width);
+	bg->setScaleY((winSize.height + 10.0f) / bgSize.height);
+	bg->setPosition({ -5.0f, -5.0f });
+	bg->setColor({ 0, 102, 255 }); // todo: let mods customize this
+
+    return bg;
+}