Added reroll for duplicate colors

index.js

@@ -14,13 +14,26 @@ fs.readdir('./frames').then(data => {
 });
 
 const colorsOptions = ['red', 'yellow', 'green', 'blue', 'magenta', 'cyan', 'white'];
+const numColors = colorsOptions.length;
 
 const streamer = stream => {
   let index = 0;
+  let lastColor = -1;
+  let newColor = 0;
   return setInterval(() => {
     if (index >= frames.length) index = 0; stream.push('\033c');
-    const c = colorsOptions[Math.floor(Math.random() * colorsOptions.length)];
-    stream.push(colors[c](frames[index]));
+
+    newColor = Math.floor(Math.random() * numColors);
+
+    // Reroll for a new color if it was the same as last frame
+    if(newColor == lastColor) {
+      newColor += (1 + Math.floor(Math.random() * (numColors - 1)));
+      newColor %= numColors;
+    }
+
+    lastColor = newColor;
+    stream.push(colors[colorsOptions[newColor]](frames[index]));
+
     index++;
   }, 70);
 }