Added AnimationEffect::Blinker to quickly create a blinking sprite effect from an image file.

src/effects.cpp

@@ -31,11 +31,11 @@ ClockEffect effect_clock;
 TimerEffect effect_timer;
 
 // We're using 0 instead of false to get a better visual difference between true and false.
-const EffectEntry effects[] = {
+EffectEntry effects[] = {
 	/*  0 */ {"sinematrix3",           true,  [](){ return new Sinematrix3Effect(); }},
 	/*  1 */ {"big_clock",             true,  [](){ return new BigClockEffect(); }},
 	/*  2 */ {"clock",                 0,     [](){ return new ClockEffect(); }},
-	/*  3 */ {"bell",                  0,     [](){ return new BellEffect(); }},
+	/*  3 */ {"bell",                  0,     [](){ return AnimationEffect::Blinker("/bell.pia", 300, 0xFFFF00); }},
 	/*  4 */ {"off",                   0,     [](){ return new StaticEffect(0x000000); }},
 	/*  5 */ {"single_dynamic",        true,  [](){ return new SingleDynamicEffect(); }},
 	/*  6 */ {"multi_dynamic",         true,  [](){ return new MultiDynamicEffect(); }},