Put the wasm load in its own code block

src/index.md

@@ -21,8 +21,6 @@ import random from "npm:random";
 
 import * as resvg from 'npm:@resvg/resvg-wasm';
 
-await resvg.initWasm(fetch('https://unpkg.com/@resvg/resvg-wasm/index_bg.wasm'));
-
 const CELL = 10;
 const MAG = 2;
 const WIDTH = 20;
@@ -61,6 +59,14 @@ const randomise_all = view(Inputs.button("Random", {label:"all"}));
 
 
 
+```
+
+```js
+// in its own code block so that it doesn't slow down load for the rest
+// of the page
+await resvg.initWasm(fetch('https://unpkg.com/@resvg/resvg-wasm/index_bg.wasm'));
+
+const wasm_init = "ready";
 ```
 
 
@@ -164,6 +170,11 @@ display(download(() => {
   const thing = download_as_svg(svg.node())
   return thing;
 }, "poptimal.svg", "Save as SVG"));
+```
+
+```js
+
+await wasm_init;
 
 display(download(() => {
   console.log("PNG value");