diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index f438893b..535e89cb 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -3,7 +3,7 @@ add_subdirectory(core)
 
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
-set(FRONTEND "qt" CACHE INTERNAL "")
+set(FRONTEND "sdl" CACHE INTERNAL "")
 
 if(${FRONTEND} MATCHES "qt")
   add_subdirectory(frontend/qt)
diff --git a/src/core/Scheduler.cpp b/src/core/Scheduler.cpp
index 0cd88357..7f046600 100644
--- a/src/core/Scheduler.cpp
+++ b/src/core/Scheduler.cpp
@@ -1,6 +1,28 @@
 #include <Scheduler.hpp>
+#include <algorithm>
 
 namespace natsukashii::core {
+Event::Event(u128 time, EventHandler handler, void* ptr) : time(time), handler(handler), ptr(ptr) { }
+  
 Scheduler::Scheduler() {
+  events.emplace_back(Event(UINT128_MAX, [](void*) {
+    printf("Reached event at UINT128_MAX, wtf?!\n");
+    exit(1);
+  }, nullptr));
+}
+
+void Scheduler::PushEvent(u128 time, EventHandler handler, void* ptr) {
+  for(int i = 0; i < events.size(); i++) {
+    if(time < events[i].time) { // if it's lower than the next event we can just insert it.
+      events.emplace_back(Event(time, handler, ptr));
+      break;
+    }
+  }
+}
+
+void Scheduler::Dispatch() {
+  for(auto& event : events) {
+    event.handler(event.ptr);
+  }
+}
 }
-}
\ No newline at end of file
diff --git a/src/core/Scheduler.hpp b/src/core/Scheduler.hpp
index 70a99da8..127941d7 100644
--- a/src/core/Scheduler.hpp
+++ b/src/core/Scheduler.hpp
@@ -1,10 +1,24 @@
 #pragma once
 #include <common.hpp>
+#include <vector>
 
 namespace natsukashii::core {
+using EventHandler = void(*)(void*);
+struct Event {
+  Event(u128, EventHandler, void*);
+private:
+  friend class Scheduler;
+  u128 time;
+  void* ptr;
+  EventHandler handler;
+};
+
 struct Scheduler {
   Scheduler();
+  void PushEvent(u128, EventHandler, void*);
+  void Dispatch();
 private:
   u128 currentTime = 0;
+  std::vector<Event> events{};
 };
-}
\ No newline at end of file
+}
diff --git a/src/core/common.hpp b/src/core/common.hpp
index 10ea8d0e..fc68d029 100644
--- a/src/core/common.hpp
+++ b/src/core/common.hpp
@@ -13,4 +13,8 @@ using s32 = int32_t;
 using s64 = int64_t;
 using u128 = __uint128_t;
 using s128 = __int128_t;
-using m128 = __m128i;
\ No newline at end of file
+using m128 = __m128i;
+#define UINT128_MAX ((u128)0xFFFF'FFFF'FFFF'FFFF << 64) | 0xFFFF'FFFF'FFFF'FFFF
+#define UINT128_MIN 0
+#define INT128_MAX ((u128)0x7FFF'FFFF'FFFF'FFFF << 64) | 0xFFFF'FFFF'FFFF'FFFF
+#define INT128_MIN (-INT128_MAX - 1LL)
diff --git a/src/frontend/qt/Frontend.cpp b/src/frontend/qt/Frontend.cpp
index c80f99eb..debc1eab 100644
--- a/src/frontend/qt/Frontend.cpp
+++ b/src/frontend/qt/Frontend.cpp
@@ -1,5 +1,7 @@
 #include <Frontend.hpp>
 
-Window::~Window() {}
+namespace natsukashii::frontend {
+App::~App() {}
 
-Window::Window() {}
+App::App() {}
+}
diff --git a/src/frontend/qt/Frontend.hpp b/src/frontend/qt/Frontend.hpp
index f0a5dbca..7ee98a6c 100644
--- a/src/frontend/qt/Frontend.hpp
+++ b/src/frontend/qt/Frontend.hpp
@@ -1,6 +1,8 @@
 #pragma once
-
-struct Window {
-  ~Window();
-  Window();
+namespace natsukashii::frontend {
+struct App {
+  ~App();
+  App();
+  void Run() {}
 };
+}