diff --git a/inst_experiments/.gitignore b/inst_experiments/.gitignore
index d186ac0c00a..641a92dd387 100644
--- a/inst_experiments/.gitignore
+++ b/inst_experiments/.gitignore
@@ -1 +1 @@
-./out.js
+out.js
diff --git a/inst_experiments/app.ts b/inst_experiments/app.ts
index 63c51eb38fb..14e678e081c 100644
--- a/inst_experiments/app.ts
+++ b/inst_experiments/app.ts
@@ -3,7 +3,6 @@ const asdf = 1234;
 function asdf2() {
     console.log('asdf');
     
-    
     let b = 3;
     let c = 4;
     let a = b + 1 + c;
@@ -13,4 +12,4 @@ function asdf2() {
     }
 }
 
-asdf2();
+// asdf2();
diff --git a/inst_experiments/run.js b/inst_experiments/run.js
index e205f44470e..e4ab02ecab0 100644
--- a/inst_experiments/run.js
+++ b/inst_experiments/run.js
@@ -1,4 +1,8 @@
-let offsetsCovered = [];
+let fs = require('fs');
+
+let out = fs.readFileSync('./out.js', { encoding: 'utf8' })
+
+let offsetsCovered = [ [0, out.split('').length ] ];
 
 function __INST(start, end, expr = undefined) {
     offsetsCovered.push([start, end]);
@@ -7,7 +11,22 @@ function __INST(start, end, expr = undefined) {
 
 global.__INST = __INST;
 
-require('./out.js');
+function findInstumentedItems(source) {
+    let items = source.matchAll(/__INST\((\d+), (null|\d+)/g);
+
+    let matches = [];
+    for (let item of items) {
+        let start = Number(item[1]);
+        let end = item[2] == 'null' ? null : Number(item[2]);
+        
+        matches.push([start, end]);
+    }
+    
+    return matches;
+}
+
+Function(out)()
 
 console.log('offsets covered:', offsetsCovered);
 
+console.log('all instrumented', findInstumentedItems(out));