AP_Scripting: add rgb notify led example

libraries/AP_Scripting/examples/rgb_led_test.lua

@@ -0,0 +1,38 @@
+-- This script is a test of led override
+
+local count = 0
+
+function update() -- this is the loop which periodically runs
+
+  count = count + 1
+
+  if count == 1 then
+    -- solid red
+    -- red,green,blue,rate hz, duration ms
+    notify:handle_rgb(255,0,0,0)
+  elseif count == 2 then
+    -- solid green
+    notify:handle_rgb(0,255,0,0)
+  elseif count == 3 then
+    -- solid blue
+    notify:handle_rgb(0,0,255,0)
+  elseif count == 4 then
+    -- 1hz red  + green
+    notify:handle_rgb(255,255,0,1)
+  elseif count == 5 then
+    -- 1hz green + blue
+    notify:handle_rgb(0,255,255,1)
+  elseif count == 6 then
+    -- 1hz red + blue
+    notify:handle_rgb(255,0,255,1)
+  elseif count == 7 then
+    -- fast white
+    notify:handle_rgb(255,255,255,10)
+    count = 0
+  end
+
+  return update, 15000 -- reschedules the loop in 15 seconds
+
+end
+
+return update() -- run immediately before starting to reschedule