diff --git a/.gitignore b/.gitignore
index df60db3..66abf2f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,3 @@
 *~
 build/
-test.*
+test*
diff --git a/Makefile b/Makefile
index ce9affe..5e8a65d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,8 @@
 SRC:=src/*.cpp
 INCLUDE:=include/
 BUILD:=build
-CFLAGS:=-Wall -pedantic -O3 -march=native --std=gnu++20
-LFLAGS:=-ltickit -lfmt
+CFLAGS:=-Wall -pedantic -O3 -march=native --std=gnu++20 -fgraphite -flto
+LFLAGS:=-O2 -flto -ltickit -lfmt
 
 hexview:
 	g++ $(SRC) $(CFLAGS) -I$(INCLUDE) -o $(BUILD)/$@ $(LFLAGS)
diff --git a/src/graphics.cpp b/src/graphics.cpp
index 4b01cbc..74fd3e8 100644
--- a/src/graphics.cpp
+++ b/src/graphics.cpp
@@ -2,18 +2,28 @@
 
 #include <graphics.hpp>
 
+static int on_geomchange(TickitWindow* win, TickitEventFlags flags, void* info, void* data)
+{
+  tickit_window_expose(win, NULL);
+  gr::Context* ctx = (gr::Context*)data;
+  
+}
+
 namespace gr
 {
   struct Context::_impl
   {
     Tickit* context;
+    TickitWindow* root;
   };
 
   Context::Context()
     : impl(std::make_unique<_impl>())
   {
-    //TODO: Graphics.
-    //TODO: Change hex.cpp print_screen to use these graphics instead of stdout with fmt
+    impl->context = tickit_new_stdtty();
+    impl->root = tickit_get_rootwin(impl->context);
+
+    if(!impl->root) throw "couldn't create window.";
   }
 
   Context::~Context()
diff --git a/src/hex.cpp b/src/hex.cpp
index 6ab8cce..8db205d 100644
--- a/src/hex.cpp
+++ b/src/hex.cpp
@@ -20,26 +20,28 @@ const static constexpr char ascii_map[255] = {
 					      '.', '.', '.', '.', '.', '.', '.', '.', '.', '.', '.', '.', '.', '.', '.', 	      
 };
 
+const constexpr int ROW_SZ = 24;
+
 namespace hv {
   void print_screen(const span<unsigned char> memory, unsigned long offset)
   {
     fmt::print("0x{:016x}  ", offset);
-    char ascii[17];
-    ascii[16] = 0;
+    char ascii[1 + ROW_SZ];
+    ascii[ROW_SZ] = 0;
     std::size_t i=0;
     for(;i<memory.size();i++) {
-      if (i && i % 16 == 0) {
+      if (i && i % ROW_SZ == 0) {
 	fmt::print("  {}", ascii);
 	fmt::print("\n0x{:016x}  ", i+offset);
       }
       fmt::print("{:02x} ", memory[i]);
-      ascii[i%16] = ascii_map[memory[i]];
+      ascii[i%ROW_SZ] = ascii_map[memory[i]];
     }
-    if (memory.size() % 16 != 0)
+    if (memory.size() % ROW_SZ != 0)
       {
-	auto rest = memory.size() % 16;
+	auto rest = memory.size() % ROW_SZ;
 	ascii[rest] = 0;
-	for(std::size_t j=0;j< 16 - rest;j++)
+	for(std::size_t j=0;j< ROW_SZ - rest;j++)
 	  fmt::print("   ");
 	  
       }
diff --git a/src/main.cpp b/src/main.cpp
index c7e6290..5408032 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -15,9 +15,14 @@ inline auto map_file(const char* filename)
    return hv::memory_map(filesize(filename), filename);
 }
 
-int main(void)
+int main(int argc, char** argv)
 {
-  auto map = map_file("test.txt");
+  if(!argv[1]) {
+    fmt::print("Usage: {} <file>\n", argv[0]);
+    return 1;
+  }
+  
+  auto map = map_file(argv[1]);
   auto memory = map.span();
 
   hv::print_screen(memory, 0);