Joined SingleDynamicEffect and MultiDynamicEffect into one file and finally got different timings for both classes to work.

src/effect_dynamic.cpp

@@ -0,0 +1,36 @@
+#include "effect_dynamic.h"
+#include "functions.h"
+#include "config.h"
+
+SingleDynamicEffect::SingleDynamicEffect() {
+  init();
+}
+
+void SingleDynamicEffect::init() {
+  for (int i=0; i<tile_count; i++) tiles[i] = CHSV(baseHue + random8(64), 180, 255);
+}
+
+void SingleDynamicEffect::loop() {
+  EVERY_N_MILLISECONDS( EFFECT_SINGLE_DYNAMIC_LOOP_TIME ) {
+  	tiles[random8(tile_count)] = CHSV(baseHue + random8(64), 180, 255);
+  }
+  this->draw();
+}
+
+void SingleDynamicEffect::draw() {
+	for (int x=0; x<window.w; x++) for (int y=0; y<window.h; y++) {
+    	int index = y/2 * window.w/2 + x/2;
+    	setPixel(window, x, y, tiles[index]);
+	}
+}
+
+boolean SingleDynamicEffect::can_be_shown_with_clock() {
+	return true;
+}
+
+void MultiDynamicEffect::loop() {
+  EVERY_N_MILLISECONDS( EFFECT_MULTI_DYNAMIC_LOOP_TIME ) {
+  	for (int i=0; i<tile_count; i++) tiles[i] = CHSV(baseHue + random8(64), 180, 255);
+  }
+  this->draw();
+}