diff --git a/repl/src/tunes.ts b/repl/src/tunes.ts
index 17c0e930..9147f4b8 100644
--- a/repl/src/tunes.ts
+++ b/repl/src/tunes.ts
@@ -593,3 +593,29 @@ stack(
  .legato(cosine.struct("x*8").add(4/5).mul(4/5).fast(8))
  .velocity(sine.struct("x*8").add(3/5).mul(2/5).fast(8))
  .tone((await piano()).chain(out())).fast(3/4)`;
+
+// iter, stut, stutWith
+export const undergroundPlumber = `backgroundImage('https://images.nintendolife.com/news/2016/08/video_exploring_the_funky_inspiration_for_the_super_mario_bros_underground_theme/large.jpg',{
+  className:'darken'
+})
+const drums = await players({
+  bd: 'bd/BT0A0D0.wav',
+  sn: 'sn/ST0T0S3.wav',
+  hh: 'hh/000_hh3closedhh.wav',
+  cp: 'cp/HANDCLP0.wav',
+}, 'https://loophole-letters.vercel.app/samples/tidal/')
+stack(
+"<<bd*2 bd> sn> hh".fast(4).slow(2).tone(drums.chain(vol(.5),out())),
+  stack(
+    "[c2 a1 bb1 ~] ~"
+    .stut(2, .6, 1/16)
+    .legato(.4)
+    .slow(2)
+    .tone(synth({...osc('sawtooth7'),...adsr(0,.3,0)}).chain(out())),
+    "[g2,[c3 eb3]]".iter(4)
+    .stutWith(4, 1/4, (x,n)=>x.transpose(n*12).velocity(Math.pow(.4,n)))
+    .legato(.1)
+  )
+  .transpose("<0@2 5 0 7 5 0 -5>/2")
+  .pianoroll({minMidi:21,maxMidi:180, background:'transparent',inactive:'#3F8F90',active:'#DE3123'})
+)`;
diff --git a/strudel.mjs b/strudel.mjs
index aba06811..72a3fff3 100644
--- a/strudel.mjs
+++ b/strudel.mjs
@@ -9,6 +9,8 @@ const flatten = arr => [].concat(...arr)
 
 const id = a => a
 
+const range = (min, max) => Array.from({ length: max - min + 1 }, (_, i) => i + min);
+
 export function curry(func, overload) {
     const fn = function curried(...args) {
         if (args.length >= func.length) {
@@ -713,6 +715,18 @@ class Pattern {
       return this.stack(...funcs.map((func) => func(this)));
     }
 
+    stutWith(times, time, func) {
+      return stack(...range(0, times - 1).map((i) => func(this.late(i * time), i)));
+    }
+
+    stut(times, feedback, time) {
+      return this.stutWith(times, time, (pat, i) => pat.velocity(Math.pow(feedback, i)));
+    }
+
+    iter(times) {
+      return slowcat(...range(0, times - 1).map((i) => this.early(i/times)));
+    }
+
     edit(...funcs) {
       return stack(...funcs.map(func => func(this)));
     }
@@ -1023,6 +1037,6 @@ export {Fraction, TimeSpan, Hap, Pattern,
     pure, stack, slowcat, fastcat, cat, timeCat, sequence, polymeter, pm, polyrhythm, pr, reify, silence,
     fast, slow, early, late, rev,
     add, sub, mul, div, union, every, when, off, jux, append, superimpose, 
-    struct, mask, invert, inv,
+    struct, mask, invert, inv, id, range
 }