(define (script-fu-paint-by-numbers simage slayer 
              num-colors
			  thickness
			  gaussian-blur-radius
		)
	
		(let* 
		   (
		   (color-map 0)
		   (colors 0)
		   (image-width)
		   (image-height)
			(brush-name)
		   (red 0)
		   (green 0)
		   (blue 0)
		   (y 0)
		   (image)
		   (layer)
		   (num-vectors)
		   (vector-ids)
		   (current-vector)
		   (path)
		    )
		  
		  
		  (gimp-context-push)
		  ;(gimp-image-undo-group-start image)                   ;undo-group in one step
		  ;convert to indexed
		  (set! image-width (car (gimp-image-width simage)))
	      (set! image-height (car (gimp-image-height simage)))
		  
		  
		  ;creates new image instead of working on existing one
		  (gimp-selection-all simage)
		  (gimp-edit-copy slayer)
		  (gimp-selection-none simage)
		  (set! image (car (gimp-edit-paste-as-new)))
		  (set! layer (car(gimp-image-get-active-layer image)))
		  (gimp-display-new image)
		  ;(set! image (car (gimp-image-new width height RGB)))      ;creates new image
		  
		  
		  (plug-in-gauss RUN-NONINTERACTIVE image layer
	                                        gaussian-blur-radius gaussian-blur-radius
											1 ;1 RLE or 0 IIR
	                                        )
		  (gimp-image-convert-indexed image NO-DITHER MAKE-PALETTE num-colors FALSE FALSE "unused palette name")
		  ;grabs color map
		  (set! num-colors (/ (car (gimp-image-get-colormap image)) 3))
		  (set! colors (vector->list (cadr (gimp-image-get-colormap image))))
		  
		  (gimp-image-convert-rgb image) ;converts it to rgb before we call hatch loop
		  
		  (set! y num-colors) ;loop  number of times
		  (gimp-context-set-sample-threshold 0)
		  (while (> y 0)
				;do work here
				(set! red (car colors))
				(set! green (cadr colors))
				(set! blue (caddr colors))
				;select each color
				(gimp-image-set-active-layer image layer)
				(gimp-image-select-color image CHANNEL-OP-REPLACE layer (list red green blue))
				;selection to path
				(plug-in-sel2path 1 image layer)
				(set! colors (cdddr colors))
				
				;loop control
				(set! y (- y 1))
		  );end of while 
		  (gimp-selection-none image)
          (set! num-vectors (car (gimp-image-get-vectors image)))
		  (set! vector-ids (vector->list (cadr (gimp-image-get-vectors image))))
		  (set! y num-vectors)
		  (gimp-context-set-foreground '(0 0 0))
		  (gimp-context-set-brush-size thickness)
		  (set! brush-name (car(gimp-brush-new "paint by numbers")))
			(gimp-brush-set-hardness brush-name 1)
			(gimp-brush-set-radius brush-name thickness)
			(gimp-brush-set-shape brush-name BRUSH-GENERATED-CIRCLE)
			(gimp-context-set-brush brush-name)         ;use created brush
			(gimp-context-set-brush-size thickness)
		  
		  
		  (while (> y 0)
		    (set! current-vector (car vector-ids))
			(set! path current-vector)
			(gimp-item-set-visible path TRUE)
		    (gimp-edit-stroke-vectors layer path)
			(gimp-item-set-visible path FALSE)
			(set! vector-ids (cdr vector-ids))
			(set! y (- y 1))
		  )
		   ;(gimp-image-undo-enable image) ;DN = NO UNDO
		   ;(gimp-image-undo-group-end image)                     ;undo group in one step
		   
		   
		   
		   (gimp-brush-delete brush-name)
	       (gimp-displays-flush)
		   (gimp-context-pop)
	    )
	
	
    
) ;end of define

(script-fu-register
  "script-fu-paint-by-numbers"         ;function name
  "<Image>/Script-Fu/Create New/Paint By Numbers..."    ;menu register
  "Create Paint By Numbers look."       ;description
  "Tin Tran"                          ;author name
  "copyright info and description"         ;copyright info or description
  "2015"                          ;date
  "RGB*, GRAY*"                        ;mode
  SF-IMAGE      "Image" 0                   
  SF-DRAWABLE   "Layer" 0
  SF-ADJUSTMENT "Number of colors" '(15 2 50 1 10 0 0)
  SF-ADJUSTMENT "Line Thickness(pixels)" '(2 1 10 1 10 0 0)
  SF-ADJUSTMENT "Gaussian Blur Radius(pixels)" '(10 5 100 1 10 0 0)
  
)