Add random greyscale color feature

README.md

@@ -103,7 +103,25 @@ How close two dots need to be, in pixels, before they join.
 
     5
 
-The lower the number, the more extreme the parallax effect wil be.
+The lower the number, the more extreme the parallax effect will be.
+
+### randomStrokeColor
+
+    false
+
+Overwrites `strokeColor` - Randomises the stroke colours of the particles, picking a random greyscale color between `strokeColorMin` and `strokeColorMax`, where `0 = #000` and `15 = #FFF`.
+
+## strokeColorMin
+
+    0
+
+Defines the minimum color selectable by the random color picker. Range 0-15.
+
+## strokeColorMax
+
+    15
+
+Defines the maximum color selectable by the random color picker. Range 0-15.
 
 ### onInit
 

jquery.particleground.js

@@ -95,6 +95,15 @@
       hook('onInit');
     }
 
+	/**
+		Get a random color from #000 - #FFF (0-15)
+	**/
+	function getRandColor(min,max) {
+		var t = ['#000','#111','#222','#333','#444','#555','#666','#777','#888','#999','#AAA','#BBB','#CCC','#DDD','#EEE','#FFF'];
+		var c = Math.floor((Math.random() * max) + min);
+		return t[c];
+	}
+
     /**
      * Style the canvas
      */
@@ -186,6 +195,11 @@
      * Particle
      */
     function Particle() {
+	  if (options.randomStrokeColor) {
+	    this.strokeColor = getRandColor(options.strokeColorMin,options.strokeColorMax);
+	  } else {
+		this.strokeColor = options.strokeColor;
+	  }
       this.stackPos;
       this.active = true;
       this.layer = Math.ceil(Math.random() * 3);
@@ -255,6 +269,7 @@
           }
         }
       }
+	  ctx.strokeStyle = this.strokeColor;
       ctx.stroke();
       ctx.closePath();
     }
@@ -388,6 +403,9 @@
     proximity: 100, // How close two dots need to be before they join
     parallax: true,
     parallaxMultiplier: 5, // The lower the number, the more extreme the parallax effect
+	randomStrokeColor: false, // True to enable random greyscale colors for strokes
+	strokeColorMin: 0,
+	strokeColorMax: 15,
     onInit: function() {},
     onDestroy: function() {}
   };