Embedding an image slideshow

Callstack:
    at en/kb/Embedding_an_image_slideshow
    at Template:ImageSlideshow

MindTouch.Deki.Script.Runtime.DekiScriptUndefinedNameException: reference to undefined name 'image' Exception of type 'MindTouch.Deki.Script.Runtime.DekiScriptUndefinedNameException' was thrown.
  at MindTouch.Deki.Script.Compiler.DekiScriptExpressionEvaluation.Visit (MindTouch.Deki.Script.Expr.DekiScriptVar expr, DekiScriptExpressionEvaluationState state) [0x00000] in <filename unknown>:0 
  at MindTouch.Deki.Script.Expr.DekiScriptVar.VisitWith[DekiScriptExpressionEvaluationState,Range] (IDekiScriptExpressionVisitor`2 visitor, DekiScriptExpressionEvaluationState state) [0x00000] in <filename unknown>:0 
  at MindTouch.Deki.Script.Compiler.DekiScriptExpressionEvaluation.Evaluate (MindTouch.Deki.Script.Expr.DekiScriptAccess expr, DekiScriptExpressionEvaluationState state, Boolean evaluateProperties) [0x00000] in <filename unknown>:0 
  at MindTouch.Deki.Script.Compiler.DekiScriptExpressionEvaluation.Visit (MindTouch.Deki.Script.Expr.DekiScriptAccess expr, DekiScriptExpressionEvaluationState state) [0x00000] in <filename unknown>:0 
  at MindTouch.Deki.Script.Expr.DekiScriptAccess.VisitWith[DekiScriptExpressionEvaluationState,Range] (IDekiScriptExpressionVisitor`2 visitor, DekiScriptExpressionEvaluationState state) [0x00000] in <filename unknown>:0 
  at MindTouch.Deki.Script.Compiler.DekiScriptExpressionEvaluation.Visit (MindTouch.Deki.Script.Expr.DekiScriptCall expr, DekiScriptExpressionEvaluationState state) [0x00000] in <filename unknown>:0 
  at MindTouch.Deki.Script.Expr.DekiScriptCall.VisitWith[DekiScriptExpressionEvaluationState,Range] (IDekiScriptExpressionVisitor`2 visitor, DekiScriptExpressionEvaluationState state) [0x00000] in <filename unknown>:0 
  at MindTouch.Deki.Script.Compiler.DekiScriptExpressionEvaluation.Visit (MindTouch.Deki.Script.Expr.DekiScriptTernary expr, DekiScriptExpressionEvaluationState state) [0x00000] in <filename unknown>:0 
  at MindTouch.Deki.Script.Expr.DekiScriptTernary.VisitWith[DekiScriptExpressionEvaluationState,Range] (IDekiScriptExpressionVisitor`2 visitor, DekiScriptExpressionEvaluationState state) [0x00000] in <filename unknown>:0 
  at MindTouch.Deki.Script.Compiler.DekiScriptExpressionEvaluation.Visit (MindTouch.Deki.Script.Expr.DekiScriptSequence expr, DekiScriptExpressionEvaluationState state) [0x00000] in <filename unknown>:0 
  at MindTouch.Deki.Script.Expr.DekiScriptSequence.VisitWith[DekiScriptExpressionEvaluationState,Range] (IDekiScriptExpressionVisitor`2 visitor, DekiScriptExpressionEvaluationState state) [0x00000] in <filename unknown>:0 
  at MindTouch.Deki.Script.Compiler.DekiScriptExpressionEvaluation.Visit (MindTouch.Deki.Script.Expr.DekiScriptReturnScope expr, DekiScriptExpressionEvaluationState state) [0x00000] in <filename unknown>:0 

Variation (contributed by Bryan Nelson)

Just paste the following code into a DekiScript section of a new template on your site.

/*
* ImageSlideshow Dekiscript Template
*
* by Bryan Nelson 16 May 2009
*
* {{ template.ImageSlideshow( path : uri ?, width: number ?, height: number ?) }}
* path : URI path to page with image attachements; Optional; Default = page.path
* width: Image width, Optional; Default = 320
* height: Image height, Optional; Default = 240
*
* This template inserts a table of thumbnails (with name and description) of all the
* images attached to a particular page.for the a page. If a page is not sepecified then the
* current page is used. If the number of columns are not specified then 3 is default.
*
* Work based on examples at
* http://developer.mindtouch.com/index.php?title=DekiScript/FAQ/How_do_I..._Embed_an_image_slideshow%3F&highlight=image+slideshow
*
* This template uses my preferred method of writing Dekiscript in the text editor and not
* the source editor to keep code formatting.
*
*/

var pics = map.values(wiki.getpage($0 ?? $path ?? page.path).files ?? { });
let pics = list.select(pics, "string.startswith($.mime, 'image/')");
let pics = list.collect(pics, "uri");

var webviewpics;
foreach(var pic in pics)
{
	let webviewpics = webviewpics .. [ (pic .. "?size=webview") ];
}

if(#pics > 0)
{
	image.slideshow(webviewpics, $1 ?? $width ?? 320, $2 ?? $height ?? 240, 5, "slideright");
}