diff --git a/examples-bak/hello_world.rs b/examples-bak/hello_world.rs
deleted file mode 100644
index d4848d6..0000000
--- a/examples-bak/hello_world.rs
+++ /dev/null
@@ -1,25 +0,0 @@
-#![no_std]
-#![feature(start)]
-#![forbid(unsafe_code)]
-
-use gba::{
-  io::display::{DisplayControlSetting, DisplayMode, DISPCNT},
-  vram::bitmap::Mode3,
-  Color,
-};
-
-#[panic_handler]
-fn panic(_info: &core::panic::PanicInfo) -> ! {
-  loop {}
-}
-
-#[start]
-fn main(_argc: isize, _argv: *const *const u8) -> isize {
-  const SETTING: DisplayControlSetting =
-    DisplayControlSetting::new().with_mode(DisplayMode::Mode3).with_bg2(true);
-  DISPCNT.write(SETTING);
-  Mode3::write_pixel(120, 80, Color::from_rgb(31, 0, 0));
-  Mode3::write_pixel(136, 80, Color::from_rgb(0, 31, 0));
-  Mode3::write_pixel(120, 96, Color::from_rgb(0, 0, 31));
-  loop {}
-}
diff --git a/examples-bak/light_cycle.rs b/examples-bak/light_cycle.rs
index 3514998..58f2156 100644
--- a/examples-bak/light_cycle.rs
+++ b/examples-bak/light_cycle.rs
@@ -21,8 +21,8 @@ fn main(_argc: isize, _argv: *const *const u8) -> isize {
   const SETTING: DisplayControlSetting = DisplayControlSetting::new().with_mode(DisplayMode::Mode3).with_bg2(true);
   DISPCNT.write(SETTING);
 
-  let mut px = Mode3::SCREEN_WIDTH / 2;
-  let mut py = Mode3::SCREEN_HEIGHT / 2;
+  let mut px = Mode3::WIDTH / 2;
+  let mut py = Mode3::HEIGHT / 2;
   let mut color = Color::from_rgb(31, 0, 0);
 
   loop {
@@ -36,24 +36,24 @@ fn main(_argc: isize, _argv: *const *const u8) -> isize {
 
     // draw the new game and wait until the next frame starts.
     const BLACK: Color = Color::from_rgb(0, 0, 0);
-    if px >= Mode3::SCREEN_WIDTH || py >= Mode3::SCREEN_HEIGHT {
+    if px >= Mode3::WIDTH || py >= Mode3::HEIGHT {
       // out of bounds, reset the screen and position.
       Mode3::clear_to(BLACK);
       color = color.rotate_left(5);
-      px = Mode3::SCREEN_WIDTH / 2;
-      py = Mode3::SCREEN_HEIGHT / 2;
+      px = Mode3::WIDTH / 2;
+      py = Mode3::HEIGHT / 2;
     } else {
-      let color_here = Mode3::read_pixel(px, py);
+      let color_here = Mode3::read(px, py);
       if color_here != Some(BLACK) {
         // crashed into our own line, reset the screen
         Mode3::dma_clear_to(BLACK);
         color = color.rotate_left(5);
       } else {
         // draw the new part of the line
-        Mode3::write_pixel(px, py, color);
-        Mode3::write_pixel(px, py + 1, color);
-        Mode3::write_pixel(px + 1, py, color);
-        Mode3::write_pixel(px + 1, py + 1, color);
+        Mode3::write(px, py, color);
+        Mode3::write(px, py + 1, color);
+        Mode3::write(px + 1, py, color);
+        Mode3::write(px + 1, py + 1, color);
       }
     }
     spin_until_vdraw();
diff --git a/examples/hello_world.rs b/examples/hello_world.rs
new file mode 100644
index 0000000..122646b
--- /dev/null
+++ b/examples/hello_world.rs
@@ -0,0 +1,56 @@
+#![no_std]
+#![feature(start)]
+#![forbid(unsafe_code)]
+
+use gba::{
+  fatal,
+  io::display::{DisplayControlSetting, DisplayMode, DISPCNT},
+  vram::bitmap::{Mode3, Mode4, Mode5, Page},
+  warn, Color,
+};
+
+#[panic_handler]
+fn panic(info: &core::panic::PanicInfo) -> ! {
+  fatal!("{}", info);
+  loop {}
+}
+
+#[start]
+fn main(_argc: isize, _argv: *const *const u8) -> isize {
+  const SETTING: DisplayControlSetting =
+    DisplayControlSetting::new().with_mode(DisplayMode::Mode5).with_bg2(true);
+  DISPCNT.write(SETTING);
+
+  use gba::io::timers::*;
+  let tcs0 = TimerControlSetting::new().with_enabled(true);
+  let tcs1 = TimerControlSetting::new().with_tick_rate(TimerTickRate::Cascade).with_enabled(true);
+
+  TM1CNT_H.write(tcs1);
+  TM0CNT_H.write(tcs0);
+  let start = TM0CNT_L.read();
+  Mode5::clear_to(Page::Zero, Color(0));
+  let end0 = TM0CNT_L.read();
+  let end1 = TM1CNT_L.read();
+  warn!("CLEAR_TO: start:{}, end0:{}, end1:{}", start, end0, end1);
+
+  // reset
+  TM1CNT_H.write(TimerControlSetting::new());
+  TM0CNT_H.write(TimerControlSetting::new());
+
+  TM1CNT_H.write(tcs1);
+  TM0CNT_H.write(tcs0);
+  let start = TM0CNT_L.read();
+  Mode5::dma_clear_to(Page::Zero, Color(0));
+  let end0 = TM0CNT_L.read();
+  let end1 = TM1CNT_L.read();
+  warn!("DMA_CLEAR_TO: start:{}, end0:{}, end1:{}", start, end0, end1);
+
+  DISPCNT.write(DisplayControlSetting::new().with_mode(DisplayMode::Mode3).with_bg2(true));
+  loop {
+    let this_frame_keys = gba::io::keypad::read_key_input();
+    gba::io::display::spin_until_vblank();
+    Mode3::dma_clear_to(Color(111));
+    Mode3::draw_line(5, 5, 240, 160, Color(0b0_11111_11111_11111));
+    gba::io::display::spin_until_vdraw();
+  }
+}