diff --git a/docs/lane-is-a-view-plan.md b/docs/lane-is-a-view-plan.md
index 7e5ebf4..cc136d6 100644
--- a/docs/lane-is-a-view-plan.md
+++ b/docs/lane-is-a-view-plan.md
@@ -123,6 +123,37 @@ people, and it does not make the symbol a different kind of thing. The thing
 to hold the line on is that nothing outside the timeline, and the commit
 path's overlap check, is allowed to read it.
 
+## Two things are called loop
+
+Before any of this, name them apart, in the way the vocabulary table in
+`lane-handoff.md` names a cel apart from an exposure.
+
+- **Loop playback** is the transport repeating the open symbol while it plays.
+  It is `[:playback :loop?]` in app-db, the ⟳ button in the strip, and it is
+  EDITOR STATE. The document does not know about it.
+- **A looping instance** is a node repeating the symbol it places: a four-frame
+  tire turning for the hundred and twenty frames the instance is on screen.
+  It is `:playback {:end :loop}` on the node, and it is in the DOCUMENT.
+
+The car tire is the second one, and here is its actual status: it already
+works in the evaluator and cannot be asked for. `node/placed-frame` does the
+modulo, `node/problems` already admits `:end` of `:stop`, `:hold` or `:loop`,
+`nest/audio-tracks` already expands a loop into its periods — and nothing in
+the UI sets it. It is implemented and unreachable.
+
+So three things are missing, and they are the work:
+
+1. **A control.** Where an instance's playback is edited: `:in`, `:speed`, and
+   what happens at the end. One place, three fields, rather than a loop
+   checkbox somewhere else.
+2. **Drawing the repeats.** `ui/timeline`'s docstring already admits that only
+   the first pass of a looping instance is drawn, so a tire turning thirty
+   times shows one turn's keys and then nothing. A looping block should show
+   its passes — at minimum the period boundaries, so the row says how many
+   times round it goes.
+3. **The audio period guard** below, which a loop needs whether or not holds
+   become loops.
+
 ## Tear out the held cel
 
 A held cel is a 1-frame symbol shown for many frames. A 1-frame symbol with
@@ -132,9 +163,13 @@ keeping a special case for free.
 
 **What is already true**, so that nothing has to move: `:span` is on the node,
 in its own frames; `:time` (`:at`, `:rate`) is on the node; looping is on the
-node. The SYMBOL owns only `:frames`, the authored window. So looping and span
-are instance properties already, and this change is about deleting a mode, not
-relocating a field.
+node, as `:playback :end`. The SYMBOL owns only `:frames`, the authored
+window. So looping and span are instance properties already, and this change
+is about deleting a mode, not relocating a field.
+
+It does mean the two changes are joined at one point: making every drawing a
+looping instance is not safe until a looping instance can be seen and edited,
+or every drawing in the document acquires a property with no control on it.
 
 **What has to be decided and collapsed:**