afegit pulso de color

Makefile

@@ -37,6 +37,7 @@ APP_SOURCES := \
     source/core/system/director.cpp \
     source/core/rendering/sdl_manager.cpp \
     source/core/rendering/line_renderer.cpp \
+    source/core/rendering/color_oscillator.cpp \
     source/core/rendering/polygon_renderer.cpp \
     source/core/rendering/primitives.cpp \
     source/game/options.cpp \