Changes

* set gray: sets the gray-level of the pen (Only available in Turtle Blocks)

* set gray: sets the gray-level of the pen (Only available in Turtle Blocks)

* gray: current pen gray level (can be used in place of a number block) (Only available in Turtle Blocks)

* gray: current pen gray level (can be used in place of a number block) (Only available in Turtle Blocks)

* start fill: starts a filled polygon

* start fill: starts a filled polygon (straight sides, not arcs)

* end fill: ends a fill polygon

* end fill: ends a fill polygon (straight sides, not arcs)

====Color Palette====

====Color Palette====