diff --git a/private/sdl_gpu_test/0_clear_swapchain/app.cpp b/private/sdl_gpu_test/0_clear_swapchain/app.cpp
new file mode 100644
index 0000000..6c996f8
--- /dev/null
+++ b/private/sdl_gpu_test/0_clear_swapchain/app.cpp
@@ -0,0 +1,24 @@
+
+#include "./app.hpp"
+
+namespace sdl_gpu_test
+{
+void ClearSwapchainApp::update(const AppUpdateArgs& args)
+{
+    Application::update(args);
+
+    sdlpp::GPUCommandBuffer cmdBuffer = mDevice.acquireCommandBuffer();
+    Uint32 swapchainWidth = 0, swapchainHeight = 0;
+    sdlpp::GPUTexture swapchainTexture = cmdBuffer.acquireSwapchainTexture(mWindow, swapchainWidth, swapchainHeight);
+    std::array colorTargets = {sdlpp::GPUColorTargetInfo{
+        .texture = swapchainTexture,
+        .clearColor = {.r = 1.f, .g = 0.f, .b = 0.f, .a = 1.f},
+        .loadOp = sdlpp::GPULoadOp::CLEAR,
+    }};
+    sdlpp::GPURenderPass renderPass = cmdBuffer.beginRenderPass({
+        .colorTargetInfos = colorTargets
+    });
+    renderPass.end();
+    cmdBuffer.submit();
+}
+}
diff --git a/private/sdl_gpu_test/0_clear_swapchain/app.hpp b/private/sdl_gpu_test/0_clear_swapchain/app.hpp
new file mode 100644
index 0000000..6e60238
--- /dev/null
+++ b/private/sdl_gpu_test/0_clear_swapchain/app.hpp
@@ -0,0 +1,18 @@
+
+#pragma once
+
+#if !defined(SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_0_CLEAR_SWAPCHAIN_APP_HPP_INCLUDED)
+#define SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_0_CLEAR_SWAPCHAIN_APP_HPP_INCLUDED 1
+
+#include "../application.hpp"
+
+namespace sdl_gpu_test
+{
+class ClearSwapchainApp : public Application
+{
+public:
+    void update(const AppUpdateArgs& args) override;
+};
+} // namespace sdl_gpu_test
+
+#endif // !defined(SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_0_CLEAR_SWAPCHAIN_APP_HPP_INCLUDED)
diff --git a/private/sdl_gpu_test/1_green_triangle/app.cpp b/private/sdl_gpu_test/1_green_triangle/app.cpp
new file mode 100644
index 0000000..612215e
--- /dev/null
+++ b/private/sdl_gpu_test/1_green_triangle/app.cpp
@@ -0,0 +1,91 @@
+
+#include "./app.hpp"
+
+namespace sdl_gpu_test
+{
+namespace
+{
+const char* const VERTEX_SOURCE = R"(
+#version 460
+const vec2 vertices[3] = vec2[3](
+    vec2(-0.5, 0.5),
+    vec2( 0.5, 0.5),
+    vec2( 0.0, -0.5)
+);
+
+void main()
+{
+    gl_Position = vec4(vertices[gl_VertexIndex], 0.0, 1.0);
+}
+)";
+
+const char* const FRAGMENT_SOURCE = R"(
+#version 460
+layout(location = 0)
+out vec4 o_color;
+
+void main()
+{
+    o_color = vec4(0.0, 1.0, 0.0, 1.0);
+}
+)";
+}
+
+void GreenTriangleApp::init(const AppInitArgs& args)
+{
+    Application::init(args);
+
+    // create vertex shader
+    mijin::TypelessBuffer vertexSpv = getFileContentsBinary("shaders/glsl/triangle.vert.spv");
+    sdlpp::GPUShader vertexShader;
+    vertexShader.create(mDevice, {
+        .code = {static_cast<const Uint8*>(vertexSpv.data()), vertexSpv.byteSize()},
+        .format = sdlpp::GPUShaderFormat::SPIRV,
+        .stage = sdlpp::GPUShaderStage::VERTEX
+    });
+
+    // create fragment shader
+    mijin::TypelessBuffer fragmentSpv = getFileContentsBinary("shaders/glsl/green.frag.spv");
+    sdlpp::GPUShader fragmentShader;
+    fragmentShader.create(mDevice, {
+        .code = {static_cast<const Uint8*>(fragmentSpv.data()), fragmentSpv.byteSize()},
+        .format = sdlpp::GPUShaderFormat::SPIRV,
+        .stage = sdlpp::GPUShaderStage::FRAGMENT
+    });
+
+    // create graphics pipeline
+    std::array colorTargetsDescs = {
+        sdlpp::GPUColorTargetDescription{
+            .format = mDevice.getSwapchainTextureFormat(mWindow)
+        }
+    };
+    mPipeline.create(mDevice, {
+        .vertexShader =  vertexShader,
+        .fragmentShader = fragmentShader,
+        .targetInfo = {
+            .colorTargetDescriptions = colorTargetsDescs
+        }
+    });
+}
+
+void GreenTriangleApp::update(const AppUpdateArgs& args)
+{
+    Application::update(args);
+
+    sdlpp::GPUCommandBuffer cmdBuffer = mDevice.acquireCommandBuffer();
+    Uint32 swapchainWidth = 0, swapchainHeight = 0;
+    sdlpp::GPUTexture swapchainTexture = cmdBuffer.acquireSwapchainTexture(mWindow, swapchainWidth, swapchainHeight);
+    std::array colorTargets = {sdlpp::GPUColorTargetInfo{
+        .texture = swapchainTexture,
+        .clearColor = {.r = 1.f, .g = 0.f, .b = 0.f, .a = 1.f},
+        .loadOp = sdlpp::GPULoadOp::CLEAR,
+    }};
+    sdlpp::GPURenderPass renderPass = cmdBuffer.beginRenderPass({
+        .colorTargetInfos = colorTargets
+    });
+    renderPass.bindGraphicsPipeline(mPipeline);
+    renderPass.drawPrimitives({.numVertices = 3});
+    renderPass.end();
+    cmdBuffer.submit();
+}
+}
diff --git a/private/sdl_gpu_test/1_green_triangle/app.hpp b/private/sdl_gpu_test/1_green_triangle/app.hpp
new file mode 100644
index 0000000..cb198c9
--- /dev/null
+++ b/private/sdl_gpu_test/1_green_triangle/app.hpp
@@ -0,0 +1,21 @@
+
+#pragma once
+
+#if !defined(SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_1_GREEN_TRIANGLE_APP_HPP_INCLUDED)
+#define SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_1_GREEN_TRIANGLE_APP_HPP_INCLUDED 1
+
+#include "../application.hpp"
+
+namespace sdl_gpu_test
+{
+class GreenTriangleApp : public Application
+{
+private:
+    sdlpp::GPUGraphicsPipeline mPipeline;
+public:
+    void init(const AppInitArgs& args) override;
+    void update(const AppUpdateArgs& args) override;
+};
+} // namespace sdl_gpu_test
+
+#endif // !defined(SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_1_GREEN_TRIANGLE_APP_HPP_INCLUDED)
diff --git a/private/sdl_gpu_test/0_triangle_with_texcoords/app.cpp b/private/sdl_gpu_test/2_triangle_with_texcoords/app.cpp
similarity index 100%
rename from private/sdl_gpu_test/0_triangle_with_texcoords/app.cpp
rename to private/sdl_gpu_test/2_triangle_with_texcoords/app.cpp
diff --git a/private/sdl_gpu_test/0_triangle_with_texcoords/app.hpp b/private/sdl_gpu_test/2_triangle_with_texcoords/app.hpp
similarity index 69%
rename from private/sdl_gpu_test/0_triangle_with_texcoords/app.hpp
rename to private/sdl_gpu_test/2_triangle_with_texcoords/app.hpp
index c952273..bf11bc3 100644
--- a/private/sdl_gpu_test/0_triangle_with_texcoords/app.hpp
+++ b/private/sdl_gpu_test/2_triangle_with_texcoords/app.hpp
@@ -1,8 +1,8 @@
 
 #pragma once
 
-#if !defined(SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_0_TRIANGLE_WITH_TEXCOORDS_APP_HPP_INCLUDED)
-#define SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_0_TRIANGLE_WITH_TEXCOORDS_APP_HPP_INCLUDED 1
+#if !defined(SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_2_TRIANGLE_WITH_TEXCOORDS_APP_HPP_INCLUDED)
+#define SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_2_TRIANGLE_WITH_TEXCOORDS_APP_HPP_INCLUDED 1
 
 #include "../application.hpp"
 
@@ -19,4 +19,4 @@ public:
 };
 } // namespace sdl_gpu_test
 
-#endif // !defined(SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_0_TRIANGLE_WITH_TEXCOORDS_APP_HPP_INCLUDED)
+#endif // !defined(SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_2_TRIANGLE_WITH_TEXCOORDS_APP_HPP_INCLUDED)
diff --git a/private/sdl_gpu_test/1_textured_quad/app.cpp b/private/sdl_gpu_test/3_textured_quad/app.cpp
similarity index 100%
rename from private/sdl_gpu_test/1_textured_quad/app.cpp
rename to private/sdl_gpu_test/3_textured_quad/app.cpp
diff --git a/private/sdl_gpu_test/1_textured_quad/app.hpp b/private/sdl_gpu_test/3_textured_quad/app.hpp
similarity index 70%
rename from private/sdl_gpu_test/1_textured_quad/app.hpp
rename to private/sdl_gpu_test/3_textured_quad/app.hpp
index 3debb8c..538f375 100644
--- a/private/sdl_gpu_test/1_textured_quad/app.hpp
+++ b/private/sdl_gpu_test/3_textured_quad/app.hpp
@@ -1,8 +1,8 @@
 
 #pragma once
 
-#if !defined(SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_1_TEXTURED_QUAD_APP_HPP_INCLUDED)
-#define SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_1_TEXTURED_QUAD_APP_HPP_INCLUDED 1
+#if !defined(SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_3_TEXTURED_QUAD_APP_HPP_INCLUDED)
+#define SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_3_TEXTURED_QUAD_APP_HPP_INCLUDED 1
 
 #include "../application.hpp"
 
@@ -21,4 +21,4 @@ public:
 };
 } // namespace sdl_gpu_test
 
-#endif // !defined(SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_1_TEXTURED_QUAD_APP_HPP_INCLUDED)
+#endif // !defined(SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_3_TEXTURED_QUAD_APP_HPP_INCLUDED)
diff --git a/private/sdl_gpu_test/2_textured_cube/app.cpp b/private/sdl_gpu_test/4_textured_cube/app.cpp
similarity index 100%
rename from private/sdl_gpu_test/2_textured_cube/app.cpp
rename to private/sdl_gpu_test/4_textured_cube/app.cpp
diff --git a/private/sdl_gpu_test/2_textured_cube/app.hpp b/private/sdl_gpu_test/4_textured_cube/app.hpp
similarity index 75%
rename from private/sdl_gpu_test/2_textured_cube/app.hpp
rename to private/sdl_gpu_test/4_textured_cube/app.hpp
index 3ffb38e..e2c7964 100644
--- a/private/sdl_gpu_test/2_textured_cube/app.hpp
+++ b/private/sdl_gpu_test/4_textured_cube/app.hpp
@@ -1,8 +1,8 @@
 
 #pragma once
 
-#if !defined(SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_2_TEXTURED_CUBE_APP_HPP_INCLUDED)
-#define SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_2_TEXTURED_CUBE_APP_HPP_INCLUDED 1
+#if !defined(SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_4_TEXTURED_CUBE_APP_HPP_INCLUDED)
+#define SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_4_TEXTURED_CUBE_APP_HPP_INCLUDED 1
 
 #include "../application.hpp"
 
@@ -25,4 +25,4 @@ public:
 };
 } // namespace sdl_gpu_test
 
-#endif // !defined(SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_2_TEXTURED_CUBE_APP_HPP_INCLUDED)
+#endif // !defined(SDL_GPU_TEST_PRIVATE_SDL_GPU_TEST_4_TEXTURED_CUBE_APP_HPP_INCLUDED)
diff --git a/private/sdl_gpu_test/SModule b/private/sdl_gpu_test/SModule
index b3a17d8..e69aa64 100644
--- a/private/sdl_gpu_test/SModule
+++ b/private/sdl_gpu_test/SModule
@@ -8,9 +8,11 @@ src_files = Split("""
     util/bitmap.cpp
     util/mesh.cpp
     
-    0_triangle_with_texcoords/app.cpp
-    1_textured_quad/app.cpp
-    2_textured_cube/app.cpp
+    0_clear_swapchain/app.cpp
+    1_green_triangle/app.cpp
+    2_triangle_with_texcoords/app.cpp
+    3_textured_quad/app.cpp
+    4_textured_cube/app.cpp
 """)
 
 shader_files = env.Glob("#assets/shaders/glsl/*.frag") \
diff --git a/private/sdl_gpu_test/main.cpp b/private/sdl_gpu_test/main.cpp
index 89cd426..7222380 100644
--- a/private/sdl_gpu_test/main.cpp
+++ b/private/sdl_gpu_test/main.cpp
@@ -1,7 +1,9 @@
 
-#include "./0_triangle_with_texcoords/app.hpp"
-#include "./1_textured_quad/app.hpp"
-#include "./2_textured_cube/app.hpp"
+#include "./0_clear_swapchain/app.hpp"
+#include "./1_green_triangle/app.hpp"
+#include "./2_triangle_with_texcoords/app.hpp"
+#include "./3_textured_quad/app.hpp"
+#include "./4_textured_cube/app.hpp"
 
 #include <mijin/debug/stacktrace.hpp>
 #include <spdlog/spdlog.h>
@@ -23,6 +25,8 @@ int main(int argc, char* argv[])
     try
     {
         // make sure app is destructed before shutting down SDL
+        // std::unique_ptr<sdl_gpu_test::Application> app = std::make_unique<sdl_gpu_test::ClearSwapchainApp>();
+        // std::unique_ptr<sdl_gpu_test::Application> app = std::make_unique<sdl_gpu_test::GreenTriangleApp>();
         // std::unique_ptr<sdl_gpu_test::Application> app = std::make_unique<sdl_gpu_test::TriangleWithTexcoordsApp>();
         // std::unique_ptr<sdl_gpu_test::Application> app = std::make_unique<sdl_gpu_test::TexturedQuadApp>();
         std::unique_ptr<sdl_gpu_test::Application> app = std::make_unique<sdl_gpu_test::TexturedCubeApp>();