Added a HIGHLIGHT_IMAGE macro...

...as a generic way of highlighting a moveto target or other important
location with a fancy blinking effect.

data/core/macros/interface-utils.cfg

@@ -43,6 +43,64 @@
     {CLEAR_VARIABLE FLOATING_TEXT_temp}
 #enddef
 
+#define HIGHLIGHT_IMAGE X Y IMAGE BACKGROUND
+    # Scrolls to the given location, blinks the given image in and out a few
+    # times, and then leaves the image in place. Use this to pinpoint an
+    # important location to the player. If there's an existing [item] on the
+    # location, specify it as the BACKGROUND or else it'll get lost during the
+    # blinking.
+    [scroll_to]
+        x,y={X},{Y}
+        check_fogged=false
+    [/scroll_to]
+    [item]
+        x,y={X},{Y}
+        image={IMAGE}
+    [/item]
+    [redraw][/redraw]
+    [delay]
+        time=300
+    [/delay]
+    [removeitem]
+        x,y={X},{Y}
+    [/removeitem]
+    [item]
+        x,y={X},{Y}
+        image={BACKGROUND}
+    [/item]
+    [redraw][/redraw]
+    [delay]
+        time=300
+    [/delay]
+    [item]
+        x,y={X},{Y}
+        image={IMAGE}
+    [/item]
+    [redraw][/redraw]
+    [delay]
+        time=300
+    [/delay]
+    [removeitem]
+        x,y={X},{Y}
+    [/removeitem]
+    [item]
+        x,y={X},{Y}
+        image={BACKGROUND}
+    [/item]
+    [redraw][/redraw]
+    [delay]
+        time=300
+    [/delay]
+    [item]
+        x,y={X},{Y}
+        image={IMAGE}
+    [/item]
+    [redraw][/redraw]
+    [delay]
+        time=400
+    [/delay]
+#enddef
+
 #define SET_LABEL X Y TEXT
     # Puts TEXT on the map at X,Y.  Strictly a syntactic shortcut.
     #