diff --git a/tutorial/wasm-game-of-life/src/lib.rs b/tutorial/wasm-game-of-life/src/lib.rs
index 72b206e..63bdda0 100644
--- a/tutorial/wasm-game-of-life/src/lib.rs
+++ b/tutorial/wasm-game-of-life/src/lib.rs
@@ -16,7 +16,6 @@ use geometry::{Camera, DirectLight, Polyeder, Primitives};
 use transform::{TMatrix};
 
 use std::fmt::{Display, Formatter, Result};
-use std::ptr;
 use std::sync::mpsc;
 use std::time::Instant;
 use wasm_bindgen::prelude::*;
@@ -35,7 +34,8 @@ pub struct Color(u8, u8, u8, u8);
 pub struct View3d { width       :u16
                   , height      :u16
                   , size        :usize
-                  , start       :Instant
+                  , degree      :i32
+                  //, start       :Instant
                   , tetrahedron :Polyeder<f64>
                   , cube        :Polyeder<f64>
                   , camera      :Option<Camera<f64>>
@@ -47,31 +47,40 @@ pub struct View3d { width       :u16
 #[wasm_bindgen]
 impl View3d {
     pub fn new(width :u16, height :u16) -> Self {
-        let size         = width as usize * height as usize;
+        let size = width as usize * height as usize;
         let light_vector = Vector(0.0, 0.0, 1.0);
 
         let mut view3d = Self { width:       width
                               , height:      height
                               , size:        size
-                              , start:       Instant::now()
+                              , degree:      0
+                              //, start:       Instant::now()
                               , tetrahedron: Polyeder::tetrahedron(100.0)
                               , cube:        Polyeder::cube(56.25)
                               , camera:      None
                               , light:       DirectLight::new(light_vector)
                               , zbuf:        vec!(0.0; size)
-                              , image:       vec!(Color(0, 0, 0, 0); size) };
+                              , image:       vec!(Color(0, 0, 0, 0xFF); size)
+        };
 
         view3d.camera = Some(Camera::<f64>::new(&view3d, 45));
         view3d
     }
 
-    pub fn update(mut self) {
-        let deg = ((self.start.elapsed() / 25).as_millis() % 360) as i32;
+    pub fn width(&self) -> u16 {
+        self.width
+    }
+
+    pub fn height(&self) -> u16 {
+        self.height
+    }
 
+    pub fn update(&mut self) {
+        //let deg = ((self.start.elapsed() / 25).as_millis() % 360) as i32;
         let  t = TMatrix::translate(Vector(0.0, 0.0, 150.0));
-        let rz = TMatrix::rotate_z(deg);
-        let rx = TMatrix::rotate_x(-deg*2);
-        let ry = TMatrix::rotate_y(-deg*2);
+        let rz = TMatrix::rotate_z(self.degree);
+        let rx = TMatrix::rotate_x(-self.degree*2);
+        let ry = TMatrix::rotate_y(-self.degree*2);
 
         let rot1 = TMatrix::combine(vec!(rz, rx, t));
         let rot2 = TMatrix::combine(vec!(rz, ry, t));
@@ -79,6 +88,8 @@ impl View3d {
         let objects = vec!( (self.tetrahedron.transform(&rot1), 0xFFFF00)
                           , (       self.cube.transform(&rot2), 0x0000FF) );
 
+        self.degree = (self.degree + 1) % 360;
+
         self.clear();
 
         match self.camera {
@@ -86,7 +97,7 @@ impl View3d {
             Some(camera) => {
                 for (o, color) in objects {
                     for (pg, c) in o.project(&camera, &self.light, color) {
-                        (&pg).fill(&mut self, c);
+                        (&pg).fill(self, c);
                     }
                 }
             },
@@ -108,11 +119,8 @@ impl Canvas<f64> for View3d {
     }
 
     fn clear(&mut self) {
-        self.zbuf = vec!(0.0; self.size);
-        unsafe {
-            let ptr  = self.image.as_mut_ptr();
-            ptr::write_bytes(ptr, 0, self.size);
-        }
+        self.zbuf  = vec!(0.0; self.size);
+        self.image = vec!(Color(0, 0, 0, 0xFF); self.size);
     }
 
     fn set_pixel(&mut self, c :Coordinate<f64>, color :u32) {
diff --git a/tutorial/wasm-game-of-life/www/index.js b/tutorial/wasm-game-of-life/www/index.js
index ac7c97e..95b30c5 100644
--- a/tutorial/wasm-game-of-life/www/index.js
+++ b/tutorial/wasm-game-of-life/www/index.js
@@ -4,17 +4,30 @@ import { memory } from "wasm-game-of-life/wasm_game_of_life_bg";
 // 3D canvas stuff
 const view3d = View3d.new(151, 151);
 
-const view3d_canvas = document.getElementById("view3d");
-view3d_canvas.width = view3d.width();
-view3d_canvas.width = view3d.height();
-
-const view3d_ctx = view3d_canvas.getContext('2d');
+const view3d_canvas  = document.getElementById("view3d");
+view3d_canvas.width  = view3d.width();
+view3d_canvas.height = view3d.height();
+const view3d_ctx     = view3d_canvas.getContext('2d');
 
 const view3d_renderLoop = () => {
     view3d.update();
+    drawView3d();
+
     requestAnimationFrame(view3d_renderLoop);
 }
 
+const drawView3d = () => {
+    const view3d_imagePtr = view3d.image();
+    const view3d_image    = new ImageData(
+        new Uint8ClampedArray( memory.buffer
+                             , view3d.image()
+                             , view3d.width() * view3d.height() * 4 )
+        , view3d.width()
+        , view3d.height() );
+
+    view3d_ctx.putImageData(view3d_image, 0, 0);
+}
+
 // game of life stuff
 const CELL_SIZE   = 5; // px
 const GRID_COLOR  = "#CCCCCC";
@@ -90,7 +103,10 @@ const drawCells = () => {
 };
 
 // start everything ...
-drawGrid();
-drawCells();
-requestAnimationFrame(renderLoop);
+//drawGrid();
+//drawCells();
+//requestAnimationFrame(renderLoop);
+
+view3d.update();
+drawView3d();
 requestAnimationFrame(view3d_renderLoop);