diff --git a/strudel.mjs b/strudel.mjs
index 5cbb6924..137efa4e 100644
--- a/strudel.mjs
+++ b/strudel.mjs
@@ -744,6 +744,11 @@ class Pattern {
     hush() {
       return silence;
     }
+
+    _len(value) {
+      // return this.withEventSpan((span) => new TimeSpan(span.begin, span.begin.add(span.end.sub(span.begin).mul(value))));
+      return this.withEventSpan((span) => new TimeSpan(span.begin, span.begin.add(value)));
+    }
 /* 
     _resolveTies() {
       return this._withEvents((events)=>{
@@ -763,7 +768,7 @@ class Pattern {
 }
 
 // methods of Pattern that get callable factories
-Pattern.prototype.patternified = ['apply', 'fast', 'slow', 'early', 'late'];
+Pattern.prototype.patternified = ['apply', 'fast', 'slow', 'early', 'late', 'len'];
 // methods that create patterns, which are added to patternified Pattern methods
 Pattern.prototype.factories = { pure, stack, slowcat, fastcat, cat, timeCat, sequence, polymeter, pm, polyrhythm, pr};
 // the magic happens in Pattern constructor. Keeping this in prototype enables adding methods from the outside (e.g. see tonal.ts)