initial commit of working code

include/README

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+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

include/jellies.h

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+#ifndef JELLIES_H
+#define JELLIES_H
+
+extern const TProgmemPalette16 rainbowPalette_p PROGMEM =
+{   
+  CRGB::Red,
+  CRGB::OrangeRed,
+  CRGB::Orange,
+  CRGB::LightYellow,
+  CRGB::Yellow,
+  CRGB::YellowGreen,
+  CRGB::LawnGreen,
+  CRGB::Green,
+  CRGB::Aquamarine,
+  CRGB::LightBlue,
+  CRGB::Blue,
+  CRGB::Cyan,
+  CRGB::BlueViolet,
+  CRGB::Violet,
+  CRGB::DarkViolet,
+  CRGB::MediumVioletRed
+};
+
+
+// extern const CHSVPalette16 rainbowSpectrumPalette_p =
+// {   
+//   CHSV(0, 160, 64),
+//   CHSV(12, 160, 64),
+//   CHSV(24, 160, 64),
+//   CHSV(36, 160, 64),
+//   CHSV(48, 160, 64),
+//   CHSV(64, 160, 64),
+//   CHSV(82, 160, 64),
+//   CHSV(104, 160, 64),
+//   CHSV(124, 160, 64),
+//   CHSV(138, 160, 64),
+//   CHSV(156, 160, 64),
+//   CHSV(174, 160, 64),
+//   CHSV(192, 160, 64),
+//   CHSV(204, 160, 64),
+//   CHSV(230, 160, 64),
+//   CHSV(244, 160, 64)
+// };
+
+#endif