diff --git a/LuaPlayground/build/debug/main.js b/LuaPlayground/build/debug/main.js
index f057151..ac2271e 100644
--- a/LuaPlayground/build/debug/main.js
+++ b/LuaPlayground/build/debug/main.js
@@ -16,7 +16,7 @@
     }
 
     getBound() {
-      var i, len, peak_rb, peak_tl, ref, start, v, x, y;
+      var j, len, peak_rb, peak_tl, ref, start, v, x, y;
       peak_tl = {
         x: 0,
         y: 0
@@ -27,8 +27,8 @@
       };
       start = null;
       ref = this.target.data;
-      for (i = 0, len = ref.length; i < len; i++) {
-        v = ref[i];
+      for (j = 0, len = ref.length; j < len; j++) {
+        v = ref[j];
         x = v[0] / this.target.resolution;
         y = v[1] / this.target.resolution;
         if (x < peak_tl.x) {
@@ -53,30 +53,84 @@
       return this.height = peak_rb.y - peak_tl.y + 2 * this.offset;
     }
 
-    prepare() {
-      var ctx, end, path, start;
-      ctx = this.el.getContext("2d");
-      ctx.translate(this.base.x, this.base.y);
-      ctx.canvas.width = this.width;
-      ctx.canvas.height = this.height;
-      paper.setup(this.el);
-      // draw the base
+    drawPoint(v, color, size) {
+      // center
+      return new paper.Path.Circle({
+        center: this.canvasPoint(v),
+        radius: size,
+        fillColor: color
+      });
+    }
+
+    drawGrid(size, color) {
+      var end, i, path, results, start, wgridsize;
+      wgridsize = this.target.resolution * size;
+      // draw y line
+      i = Math.ceil(this.bound[0].x / wgridsize);
+      while (i * wgridsize < this.bound[1].x) {
+        start = this.canvasPoint([i * wgridsize, this.bound[0].y]);
+        end = this.canvasPoint([i * wgridsize, this.bound[1].y]);
+        path = new paper.Path();
+        path.strokeColor = color;
+        path.moveTo(start);
+        path.lineTo(end);
+        i++;
+      }
+      
+      // draw x line
+      i = Math.ceil(this.bound[0].y / wgridsize);
+      results = [];
+      while (i * wgridsize < this.bound[1].y) {
+        start = this.canvasPoint([this.bound[0].x, i * wgridsize]);
+        end = this.canvasPoint([this.bound[1].x, i * wgridsize]);
+        path = new paper.Path();
+        path.strokeColor = color;
+        path.moveTo(start);
+        path.lineTo(end);
+        results.push(i++);
+      }
+      return results;
+    }
+
+    drawAxis(color) {
+      var end, path, start;
       // x axis
       path = new paper.Path();
-      path.strokeColor = '#BBBBBB';
+      path.strokeColor = color;
       start = this.canvasPoint([this.bound[0].x, 0]);
       end = this.canvasPoint([this.bound[1].x, 0]);
       path.moveTo(start);
       path.lineTo(end);
       // y axis
       path = new paper.Path();
-      path.strokeColor = '#BBBBBB';
+      path.strokeColor = color;
       start = this.canvasPoint([0, this.bound[0].y]);
       end = this.canvasPoint([0, this.bound[1].y]);
       path.moveTo(start);
-      return path.lineTo(end);
+      path.lineTo(end);
+      return this.drawPoint([0, 0], color, 3);
     }
 
+    prepare() {
+      var ctx;
+      ctx = this.el.getContext("2d");
+      ctx.translate(this.base.x, this.base.y);
+      ctx.canvas.width = this.width;
+      ctx.canvas.height = this.height;
+      return paper.setup(this.el);
+    }
+
+    //tool = new paper.Tool()
+    //hitOptions = {
+    //    segments: true,
+    //    stroke: true,
+    //    fill: true,
+    //    tolerance: 5
+    //}
+    //tool.onMouseMove = (event) ->
+    //    hitResult = paper.project.hitTest event.point, hitOptions
+    //    return unless hitResult
+    //    console.log hitResult
     render() {}
 
   };
@@ -90,13 +144,15 @@
     
     // point clound render
     render() {
-      var i, len, path, point, ref, start, v;
+      var j, len, path, point, ref, start, v;
+      this.drawGrid(20, "#DBDBDB"); // 20 px
+      this.drawAxis("#0A84FF");
       path = new paper.Path();
       path.strokeColor = 'black';
       start = null;
       ref = this.target.data;
-      for (i = 0, len = ref.length; i < len; i++) {
-        v = ref[i];
+      for (j = 0, len = ref.length; j < len; j++) {
+        v = ref[j];
         point = this.canvasPoint(v);
         if (!start) {
           start = point;
@@ -104,6 +160,7 @@
         } else {
           path.lineTo(point);
         }
+        this.drawPoint(v, "black", 4);
       }
       return paper.view.draw();
     }
diff --git a/LuaPlayground/coffees/main.coffee b/LuaPlayground/coffees/main.coffee
index 2fcca83..2dc9b02 100644
--- a/LuaPlayground/coffees/main.coffee
+++ b/LuaPlayground/coffees/main.coffee
@@ -26,28 +26,73 @@ class DataViewer
         @base = {x: 0 - @bound[0].x+ @offset, y: @bound[1].y  + @offset}
         @width = peak_rb.x - peak_tl.x + 2*@offset
         @height = peak_rb.y - peak_tl.y + 2*@offset
-    prepare: () ->
-        ctx = @el.getContext "2d"
-        ctx.translate(@base.x, @base.y)
-        ctx.canvas.width = @width
-        ctx.canvas.height = @height
-        paper.setup @el
-        # draw the base
-        # x axis
+    
+    drawPoint: (v, color, size) ->
+        # center
+        new paper.Path.Circle {
+            center: @canvasPoint(v),
+            radius: size,
+            fillColor: color
+        }
+    drawGrid: (size, color) ->
+        wgridsize = @target.resolution*size
+        # draw y line
+        i = Math.ceil(@bound[0].x / wgridsize)
+        while i*wgridsize < @bound[1].x
+            start = @canvasPoint [i*wgridsize, @bound[0].y]
+            end = @canvasPoint [i*wgridsize, @bound[1].y]
+            path = new paper.Path()
+            path.strokeColor = color
+            path.moveTo start
+            path.lineTo end
+            i++
+        
+        # draw x line
+        i = Math.ceil(@bound[0].y / wgridsize)
+        while i*wgridsize < @bound[1].y
+            start = @canvasPoint [@bound[0].x,i*wgridsize]
+            end = @canvasPoint [@bound[1].x, i*wgridsize]
+            path = new paper.Path()
+            path.strokeColor = color
+            path.moveTo start
+            path.lineTo end
+            i++
+        
+    drawAxis: (color) ->
+         # x axis
         path = new paper.Path()
-        path.strokeColor = '#BBBBBB'
+        path.strokeColor = color
         start = @canvasPoint [@bound[0].x, 0]
         end = @canvasPoint [@bound[1].x, 0]
         path.moveTo(start)
         path.lineTo(end)
         # y axis
         path = new paper.Path()
-        path.strokeColor = '#BBBBBB'
+        path.strokeColor = color
         start = @canvasPoint [0, @bound[0].y]
         end = @canvasPoint [0, @bound[1].y]
         path.moveTo(start)
         path.lineTo(end)
+        @drawPoint [0,0], color, 3
         
+    prepare: () ->
+        ctx = @el.getContext "2d"
+        ctx.translate @base.x, @base.y
+        ctx.canvas.width = @width
+        ctx.canvas.height = @height
+        paper.setup @el
+        #tool = new paper.Tool()
+        #hitOptions = {
+        #    segments: true,
+        #    stroke: true,
+        #    fill: true,
+        #    tolerance: 5
+        #}
+        #tool.onMouseMove = (event) ->
+        #    hitResult = paper.project.hitTest event.point, hitOptions
+        #    return unless hitResult
+        #    console.log hitResult
+       
     render:() ->
         # sub class responsibility
 
@@ -57,6 +102,8 @@ class PointCloudViewer extends DataViewer
     
      # point clound render
     render: () ->
+        @drawGrid 20, "#DBDBDB" # 20 px
+        @drawAxis("#0A84FF")
         path = new paper.Path()
         path.strokeColor = 'black'
         start = null
@@ -67,6 +114,7 @@ class PointCloudViewer extends DataViewer
                 path.moveTo(start)
             else
                 path.lineTo point
+            @drawPoint v, "black", 4
         paper.view.draw()
 
     
diff --git a/LuaPlayground/project.apj b/LuaPlayground/project.apj
index e5e4dd5..e8e147d 100644
--- a/LuaPlayground/project.apj
+++ b/LuaPlayground/project.apj
@@ -1 +1 @@
-{"name":"LuaPlayground","root":"home://workspace/LuaPlayground","css":["css/main.css"],"javascripts":[],"coffees":["coffees/main.coffee"],"copies":["assets/scheme.html","package.json","README.md"]}
\ No newline at end of file
+{"name":"LuaPlayground","root":"home://myws/antosdk-apps/LuaPlayground","css":["css/main.css"],"javascripts":["javascripts/paper-core.min.js"],"coffees":["coffees/main.coffee"],"copies":["assets/scheme.html","package.json","README.md"]}
\ No newline at end of file