diff --git a/lib/createRenderer.js b/lib/createRenderer.js
index 2f8996b..5be8760 100644
--- a/lib/createRenderer.js
+++ b/lib/createRenderer.js
@@ -104,6 +104,10 @@ module.exports = function createRenderer (opt) {
     p.time = random(0, p.duration);
     p.velocity = [ random(-1, 1), random(-1, 1) ];
     p.speed = random(0.5, 2) * dpr;
+    
+    // Note: We actually include the background color here.
+    // This means some strokes may seem to "erase" the other
+    // colours, which can add a nice effect.
     p.color = palette[Math.floor(random(palette.length))];
     return p;
   }