diff --git a/index.html b/index.html
index f412acd..16327b9 100644
--- a/index.html
+++ b/index.html
@@ -23,6 +23,7 @@
     <script type="text/javascript" src="scripts/modules/filter.js"></script>
     <script type="text/javascript" src="scripts/modules/filter.saturation.js"></script>
     <script type="text/javascript" src="scripts/modules/filter.chromatic.js"></script>
+    <script type="text/javascript" src="scripts/modules/filter.eval.js"></script>
     
     <script type="text/javascript" src="scripts/keyboard.js"></script>
     <script type="text/javascript" src="scripts/command.js"></script>
diff --git a/scripts/command.js b/scripts/command.js
index 010a2ce..c703cdf 100644
--- a/scripts/command.js
+++ b/scripts/command.js
@@ -6,6 +6,7 @@ function Command(content)
   
   function raster(array) // @ {50w}x100
   {
+    return array;
     var str = array.join(" ");
     
     var m = str.replace(/(\{(.*)\})/g, function(a) {
diff --git a/scripts/modules/filter.eval.js b/scripts/modules/filter.eval.js
new file mode 100644
index 0000000..695e29a
--- /dev/null
+++ b/scripts/modules/filter.eval.js
@@ -0,0 +1,27 @@
+Filter.prototype.filter_eval = function(pixels = this.pixels(),p = null)
+{
+  console.log("working");
+
+  // : eval {x} % 100 == 0
+  
+  var data = pixels.data;
+  
+  for (var i = 0; i < data.length; i += 4) {
+    
+    var x = (i/4) % pixels.width;
+    var y = Math.floor((i/4)/pixels.width);
+    
+    var q = (x % parseInt(p[0]) === 0 && y % parseInt(p[1]) === 0);
+    
+    if(q === true){
+      data[i]     = 255;     // red
+      data[i + 1] = 0; // green
+      data[i + 2] = 0; // blue
+      data[i + 3] = 255; // alpha?
+    }
+  }
+  
+	ronin.canvas.clear();
+	ronin.canvas.context().putImageData(pixels, 0, 0, 0, 0, pixels.width, pixels.height);
+  console.log("done.");
+}
\ No newline at end of file
diff --git a/scripts/modules/filter.js b/scripts/modules/filter.js
index dd6fcd6..9625f74 100644
--- a/scripts/modules/filter.js
+++ b/scripts/modules/filter.js
@@ -19,6 +19,9 @@ function Filter(element)
       case "chromatic":
         this.filter_chromatic(this.pixels(),p);
         break;
+      case "eval":
+        this.filter_eval(this.pixels(),p);
+        break;
     }
   }