diff --git a/static/strong_tag.html b/static/strong_tag.html
index c44b6b9..3a089aa 100644
--- a/static/strong_tag.html
+++ b/static/strong_tag.html
@@ -6,7 +6,7 @@
 		<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
 		<script type="text/javascript" src="jquery-2.0.3.js"></script>
 		<script type="text/javascript">
-            var margin, s1, s2, s3, hook_separation, h1, h2, h3, h4, hook_overlap, hook_height, stroke_width, staple_rise, staple_offset, staple_width;
+            var margin, s1, s2, s3, hook_separation, h1, h2, h3, h4, hook_overlap, hook_height, stroke_width, staple_rise, staple_offset, staple_width, hook_bite;
             var canvas, ctx;
             var w = this;
             $(document).ready(function() {
@@ -18,13 +18,15 @@
             });
             
             function redraw() {
-                stroke();
                 h1 = margin;
                 s1 = margin;
-                hook_separation = margin / 2;
                 staple_rise = staple_offset;
+                staple_leg_height = staple_offset;
+                interior_margin = margin;
                 
-                ctx.clearRect(0, 0, canvas.width, canvas.height);
+                ctx.fillStyle = '#000'
+                ctx.fillRect(0, 0, canvas.width, canvas.height);
+                style();
                 ctx.save();
                 draw_on(ctx);
                 ctx.translate(0, canvas.height);
@@ -39,7 +41,10 @@
                 ctx.restore();
             }
         
-        function stroke() {
+        function style() {
+            var foreground = 'white';
+            ctx.fillStyle = foreground;
+            ctx.strokeStyle = foreground;
             ctx.lineJoin = "miter";
             ctx.lineCap = "square";
             ctx.lineWidth = stroke_width;
@@ -51,21 +56,35 @@
             p1.lineTo(margin, canvas.height / 2);
             p1.lineTo(margin + s1, canvas.height / 2);
             ctx.stroke(p1)
+            
             // arms
             var p2 = new Path2D();
             p2.moveTo(margin + s1, (canvas.height / 2) - h1);
             p2.lineTo(margin + s1, margin);
             p2.lineTo((canvas.width / 2) - hook_separation, margin);
             p2.lineTo((canvas.width / 2) - hook_separation, margin + hook_height);
-            p2.lineTo((canvas.width / 2) - hook_separation - staple_width - hook_overlap, margin + hook_height);
+            p2.lineTo((canvas.width / 2) - staple_width - hook_bite, margin + hook_height);
             ctx.stroke(p2);
+            
             // staple
             var p3 = new Path2D();
-            p3.moveTo((canvas.width / 2) - hook_separation - staple_offset, margin + staple_offset);
-            p3.lineTo((canvas.width / 2) - hook_separation - staple_width - hook_overlap - staple_offset, margin + staple_offset);
-            p3.lineTo((canvas.width / 2) - hook_separation - staple_width - hook_overlap - staple_offset, margin + hook_height + staple_rise);
+            p3.moveTo((canvas.width / 2) - hook_separation + hook_bite, margin + staple_leg_height);
+            p3.lineTo((canvas.width / 2) - staple_width, margin + staple_leg_height);
+            p3.lineTo((canvas.width / 2) - staple_width, margin + hook_height + staple_offset);
             p3.lineTo((canvas.width / 2), margin + hook_height + staple_rise);
             ctx.stroke(p3);
+            
+            //interior
+            var big_rect_x1 = margin + s1 + interior_margin;
+            var big_rect_y1 = margin + interior_margin;
+            var big_rect_x2 = (canvas.width / 2) - staple_width - interior_margin;
+            var big_rect_y2 = (canvas.height / 2) + 1;
+            ctx.fillRect(big_rect_x1, big_rect_y1, big_rect_x2 - big_rect_x1, big_rect_y2 - big_rect_y1);
+            var small_rect_x1 = margin + s1 + interior_margin;
+            var small_rect_y1 = margin + hook_height + staple_rise + interior_margin;
+            var small_rect_x2 = (canvas.width / 2) + 1;
+            var small_rect_y2 = (canvas.height / 2) + 1;
+            ctx.fillRect(small_rect_x1, small_rect_y1, small_rect_x2 - small_rect_x1, small_rect_y2 - small_rect_y1);
         }
 		</script>
         <style>
@@ -79,11 +98,12 @@
 	</head>
 	<body>
 		<canvas width="600" height="250"></canvas>
-        <p><label for="stroke_width">channel width: </label><input type="range" name="stroke_width" min="0" max="20" value="10" /></p>
+        <p><label for="stroke_width">channel width: </label><input type="range" name="stroke_width" min="0" max="20" step="2" value="8" /></p>
         <p><label for="margin">margin: </label><input type="range" name="margin" min="10" max="40" value="20"/></p>
-        <p><label for="hook_height">hooks height: </label><input type="range" name="hook_height" min="20" max="60" value="40"/></p>
-        <p><label for="staple_width">staple width: </label><input type="range" name="staple_width" min="0" max="50" value="25"/></p>
-        <p><label for="staple_offset">staple offset: </label><input type="range" name="staple_offset" value="20" min="5" max="60" value="17"/></p>
-        <p><label for="hook_overlap">hook overlap: </label><input type="range" id="hook_overlap" name="hook_overlap" min="0" max="20" value="5"/></p>
+        <p><label for="hook_separation">hook separation: </label><input type="range" name="hook_separation" min="5" max="40" value="16"/></p>
+        <p><label for="hook_height">hooks height: </label><input type="range" name="hook_height" min="20" max="60" value="37"/></p>
+        <p><label for="staple_width">staple width: </label><input type="range" name="staple_width" min="0" max="70" value="50"/></p>
+        <p><label for="staple_offset">staple offset: </label><input type="range" name="staple_offset" min="5" max="60" value="17"/></p>
+        <p><label for="hook_bite">hook bite: </label><input type="range" name="hook_bite" min="-40" max="-5" value="-15"/></p>
 	</body>
 </html>