Make monster flash

apps/gobble6/gobble6.c

@@ -61,6 +61,12 @@ int main (void)
         navswitch_tick++;
         if (navswitch_tick >= LOOP_RATE / NAVSWITCH_RATE)
         {
+            static int count = 0;
+
+            count++;
+            if (running && count % 4 == 0)
+                monster_toggle ();
+
             navswitch_tick = 0;
 
             navswitch_update ();

apps/gobble6/things.c

@@ -98,6 +98,13 @@ void monster_move (int8_t dx, int8_t dy)
 }
 
 
+void monster_toggle (void)
+{
+    tinygl_pixel_set (things[0].pos, ! tinygl_pixel_get (things[0].pos));
+}
+
+
+
 static void thing_move (uint8_t this)
 {
     uint8_t i;

apps/gobble6/things.h

@@ -3,16 +3,14 @@
 
 #include "system.h"
 
-void things_create (void);
-
-void things_twinkle (void);
-
-void things_display (uint8_t tick);
-
 bool things_killed_p (void);
 
-void monster_move (int8_t dx, int8_t dy);
+void things_create (void);
 
 void things_move (void);
 
+void monster_move (int8_t dx, int8_t dy);
+
+void monster_toggle (void);
+
 #endif