diff --git a/blocks.js b/blocks.js
index da5e9294..65ab90be 100644
--- a/blocks.js
+++ b/blocks.js
@@ -918,8 +918,8 @@ SyntaxElementMorph.prototype.labelPart = function (spec) {
                     negative : ['negative'],
                     comic: ['comic'],
                     duplicate: ['duplicate'],
-                    confetti: ['confetti'],
-                },
+                    confetti: ['confetti']
+                    },
                 true
             );
             part.setContents(['ghost']);
diff --git a/objects.js b/objects.js
index 7d6ce148..81ce072b 100644
--- a/objects.js
+++ b/objects.js
@@ -1292,11 +1292,11 @@ SpriteMorph.prototype.init = function (globals) {
     this.idx = 0; // not to be serialized (!) - used for de-serialization
     this.wasWarped = false; // not to be serialized, used for fast-tracking
 
-    this.graphicsValues = { 'negative': 0,  //dictionary of all the orignal values
-                            'fisheye': 0, 
-                            'whirl': 0, 
-                            'pixelate': 0, 
-                            'mosaic': 0, 
+    this.graphicsValues = { 'negative': 0,
+                            'fisheye': 0,
+                            'whirl': 0,
+                            'pixelate': 0,
+                            'mosaic': 0,
                             'brightness': 0,
                             'color': 0,
                             'comic': 0,
@@ -1431,7 +1431,7 @@ SpriteMorph.prototype.drawNew = function () {
         ctx.scale(this.scale * stageScale, this.scale * stageScale);
         ctx.translate(shift.x, shift.y);
         ctx.rotate(radians(facing - 90));
-        ctx.drawImage(pic.contents, 0, 0); 
+        ctx.drawImage(pic.contents, 0, 0);
 
         // apply graphics effects to image
         this.image = this.applyGraphicsEffects(this.image);
@@ -2847,13 +2847,14 @@ SpriteMorph.prototype.changeScale = function (delta) {
     this.setScale(this.getScale() + (+delta || 0));
 };
 
-// Spritemorph graphics effects
+// Spritemorph graphic effects
 
 SpriteMorph.prototype.graphicsChanged = function () {
     var myself = this;
     return Object.keys(this.graphicsValues).some(
-        function(any) {
-            return myself.graphicsValues[any] < 0 || myself.graphicsValues[any] > 0;
+        function (any) {
+            return myself.graphicsValues[any] < 0 ||
+                    myself.graphicsValues[any] > 0;
         }
     );
 };
@@ -2861,103 +2862,106 @@ SpriteMorph.prototype.graphicsChanged = function () {
 SpriteMorph.prototype.applyGraphicsEffects = function (canvas) {
 // For every effect: apply transform of that effect(canvas, stored value)
 // The future: write more effects here
+    var ctx, imagedata, pixels, newimagedata;
 
     function transform_negative(p, value) {
+        var i, rcom, gcom, bcom;
         if (value !== 0) {
-            for (i = 0; i < p.length; i = i + 4) {
-                var rcom = 255 - p[i + 0]
-                var gcom = 255 - p[i + 1]
-                var bcom = 255 - p[i + 2]
+            for (i = 0; i < p.length; i += 4) {
+                rcom = 255 - p[i];
+                gcom = 255 - p[i + 1];
+                bcom = 255 - p[i + 2];
 
-                if (p[i + 0] < rcom) { //check if current number less than the complement. if so, then
-                    p[i + 0] = p[i + 0] + value
-                } else if (p[i + 0] > rcom) { 
-                    p[i + 0] = p[i + 0] - value //or else decrease towards it
+                if (p[i] < rcom) { //compare to the complement
+                    p[i] += value;
+                } else if (p[i] > rcom) {
+                    p[i] -= value;
                 }
                 if (p[i + 1] < gcom) {
-                    p[i + 1] = p[i + 1] + value 
+                    p[i + 1] += value;
                 } else if (p[i + 1] > gcom) {
-                   p[i + 1] = p[i + 1] - value  
+                    p[i + 1] -= value;
                 }
                 if (p[i + 2] < bcom) {
-                    p[i + 2] = p[i + 2] + value 
+                    p[i + 2] += value;
                 } else if (p[i + 2] > bcom) {
-                    p[i + 2] = p[i + 2] - value
-                };  
-            };
-        };
+                    p[i + 2] -= value;
+                }
+            }
+        }
         return p;
-    };
+    }
 
     function transform_brightness(p, value) {
+        var i;
         if (value !== 0) {
             for (i = 0; i < p.length; i += 4) {
-                p[i+0] = p[i+0] + value; //255 = 100% of this color. 255 everything = white.  
-                p[i+1] = p[i+1] + value; //if value is negative, add more value to p. if value is positive, subtract value from p
-                p[i+2] = p[i+2] + value;
-                p[i+3] = p[i+3];
-            };
-        };
+                p[i] += value; //255 = 100% of this color 
+                p[i + 1] += value;
+                p[i + 2] += value;
+            }
+        }
         return p;
-    };
+    }
 
     function transform_comic(p, value) {
+        var i;
         if (value !== 0) {
             for (i = 0; i < p.length; i += 4) {
-                var frequency = value;
-                p[i + 0] = p[i + 0] + Math.sin(i * frequency) * 127 + 128
-                p[i + 1] = p[i + 1] + Math.sin(i * frequency) * 127 + 128
-                p[i + 2] = p[i + 2] + Math.sin(i * frequency) * 127 + 128
-                p[i + 3] = p[i + 3];
-            };
-        };
-        return p;  
-    }; 
+                p[i] += Math.sin(i * value) * 127 + 128;
+                p[i + 1] += Math.sin(i * value) * 127 + 128;
+                p[i + 2] += Math.sin(i * value) * 127 + 128;
+            }
+        }
+        return p;
+    }
 
     function transform_duplicate(p, value) {
+        var i;
         if (value !== 0) {
             for (i = 0; i < p.length; i += 4) {
-                p[i + 0] = p[i * value + 0]
-                p[i + 1] = p[i * value + 1] 
-                p[i + 2] = p[i * value + 2]
+                p[i] = p[i * value];
+                p[i + 1] = p[i * value + 1];
+                p[i + 2] = p[i * value + 2];
                 p[i + 3] = p[i * value + 3];
-            };
-        };
+            }
+        }
         return p;
-    }; 
+    }
 
     function transform_confetti(p, value) {
+        var i;
         if (value !== 0) {
-            for (i = 0; i < p.length; i++) {
-                p[i] = Math.sin(value * p[i]) * 127 + p[i]
-            };
-        };
+            for (i = 0; i < p.length; i += 1) {
+                p[i] = Math.sin(value * p[i]) * 127 + p[i];
+            }
+        }
         return p;
-    };
+    }
 
-    if (this.graphicsChanged()) { //operates image pixel manipulation if graphicschanged = true.
-        ctx = canvas.getContext("2d"); 
+    if (this.graphicsChanged()) {
+        ctx = canvas.getContext("2d");
         imagedata = ctx.getImageData(0, 0, canvas.width, canvas.height);
         pixels = imagedata.data;
 
-        // for each effect, do a transform. at any given time, a sprite should wear all 7 effects
-        /*pixels = transform_whirl(pixels, this.graphicsValues['whirl']);*/
-        pixels = transform_negative(pixels, this.graphicsValues['negative']);
-        pixels = transform_brightness(pixels, this.graphicsValues['brightness']);
-        pixels = transform_comic(pixels, this.graphicsValues['comic']);
-        /*pixels = transform_pixelate(pixels, this.graphicsValues['pixelate']);*/
-        pixels = transform_duplicate(pixels, this.graphicsValues['duplicate']);
-        /*pixels = transform_color(pixels, this.graphicsValues['color']);*/
-        /*pixels = transform_fisheye(pixels, this.graphicsValues['fisheye']);*/
-        pixels = transform_confetti(pixels, this.graphicsValues['confetti']);
-         
-        //the last object will have all the transformations done on it
-        newimagedata = ctx.createImageData(imagedata); //make new imgdata object
-        newimagedata.data.set(pixels);                  //add transformed pixels
-        ctx.putImageData(newimagedata, 0, 0);
-    };
+        //A sprite should wear all 7 effects at once
+        /*pixels = transform_whirl(pixels, this.graphicsValues.whirl);*/
+        pixels = transform_negative(pixels, this.graphicsValues.negative);
+        pixels = transform_brightness(pixels, this.graphicsValues.brightness);
+        pixels = transform_comic(pixels, this.graphicsValues.comic);
+        /*pixels = transform_pixelate(pixels, this.graphicsValues.pixelate);*/
+        pixels = transform_duplicate(pixels, this.graphicsValues.duplicate);
+        /*pixels = transform_color(pixels, this.graphicsValues.color);*/
+        /*pixels = transform_fisheye(pixels, this.graphicsValues.fisheye);*/
+        pixels = transform_confetti(pixels, this.graphicsValues.confetti);
 
-    return canvas; //for each effect, apply the transformation on the image we receive 
+        //the last object will have all the transformations done on it
+        newimagedata = ctx.createImageData(imagedata); //make imgdata object
+        newimagedata.data.set(pixels); //add transformed pixels
+        ctx.putImageData(newimagedata, 0, 0);
+    }
+
+    return canvas;
 };
 
 SpriteMorph.prototype.setEffect = function (effect, value) {
@@ -2965,8 +2969,8 @@ SpriteMorph.prototype.setEffect = function (effect, value) {
     if (eff === 'ghost') {
         this.alpha = 1 - Math.min(Math.max(+value || 0, 0), 100) / 100;
     } else {
-        this.graphicsValues[eff] = value; //changes the value of the dictionary
-    };
+        this.graphicsValues[eff] = value;
+    }
     this.drawNew();
     this.changed();
 };
@@ -2978,16 +2982,19 @@ SpriteMorph.prototype.getGhostEffect = function () {
 SpriteMorph.prototype.changeEffect = function (effect, value) {
     var eff = effect instanceof Array ? effect[0] : null;
     if (eff === 'ghost') {
-        this.setEffect(effect, this.getGhostEffect() + (+value || 0)); //special for ghost because of alpha value
+        this.setEffect(effect, this.getGhostEffect() + (+value || 0));
     } else {
         this.setEffect(effect, this.graphicsValues[eff] + value);
-    };
+    }
 };
 
 SpriteMorph.prototype.clearEffects = function () {
-    for (var effect in this.graphicsValues) {
-        this.setEffect([effect], 0);
-    };
+    var effect;
+    for (effect in this.graphicsValues) {
+        if (this.graphicsValues.hasOwnProperty(effect)) {
+            this.setEffect([effect], 0);
+        }
+    }
     this.setEffect(['ghost'], 0);
 };
 
@@ -4141,17 +4148,17 @@ StageMorph.prototype.init = function (globals) {
     this.trailsCanvas = null;
     this.isThreadSafe = false;
 
-    this.graphicsValues = { 'negative': 0,  //dictionary of all the original values
-                            'fisheye': 0, 
-                            'whirl': 0, 
-                            'pixelate': 0, 
-                            'mosaic': 0, 
+    this.graphicsValues = { 'negative': 0,
+                            'fisheye': 0,
+                            'whirl': 0,
+                            'pixelate': 0,
+                            'mosaic': 0,
                             'brightness': 0,
                             'color': 0,
                             'comic': 0,
                             'duplicate': 0,
                             'confetti': 0
-                         };
+                        };
 
     StageMorph.uber.init.call(this);
 
@@ -4209,15 +4216,15 @@ StageMorph.prototype.setScale = function (number) {
 StageMorph.prototype.drawNew = function () {
     var ctx;
     StageMorph.uber.drawNew.call(this);
-    if (this.costume) {     
+    if (this.costume) {
         ctx = this.image.getContext('2d');
         ctx.scale(this.scale, this.scale);
-        ctx.drawImage( 
-            this.costume.contents, 
+        ctx.drawImage(
+            this.costume.contents,
             (this.width() / this.scale - this.costume.width()) / 2,
-            (this.height() / this.scale - this.costume.height()) / 2 
+            (this.height() / this.scale - this.costume.height()) / 2
         );
-        this.image = this.applyGraphicsEffects(this.image) //apply graphics effects to this image. 
+        this.image = this.applyGraphicsEffects(this.image);
     }
 };