diff --git a/WORKSHOP.md b/WORKSHOP.md
index bb0da90..a1ce738 100644
--- a/WORKSHOP.md
+++ b/WORKSHOP.md
@@ -184,19 +184,19 @@ Effects which use the surrounding pixels, or convolution matrix, are used with t
 
 ```lisp
 (open $path)
-(convolve sharpen $rect)
+(convolve (sharpen) $rect)
 ```
 
 Custom convolve kernels can also be created like this:
 
 ```lisp
 (open $path)
-(def blur 
+(def (blur) 
   (
     (-1 -1 -1) 
     (-1 5 -1) 
     (-1 -1 -1)))
-(convolve blur)
+(convolve (blur))
 ```
 
 <img src="https://raw.githubusercontent.com/hundredrabbits/100r.co/master/media/content/characters/ronin.idle.png" width="300"/>
diff --git a/examples/pixels/convolve.lisp b/examples/pixels/convolve.lisp
deleted file mode 100644
index 614040f..0000000
--- a/examples/pixels/convolve.lisp
+++ /dev/null
@@ -1,10 +0,0 @@
-(clear)
-; drag an image on the window
-(open $path)
-;
-(convolve 
-  (rect 100 100 400 400) edge)
-(convolve 
-  (rect 300 300 400 400) sharpen)
-(convolve 
-  (rect 500 500 400 400) blur)
\ No newline at end of file