diff --git a/README.md b/README.md
new file mode 100644
index 0000000..ab3c69e
--- /dev/null
+++ b/README.md
@@ -0,0 +1,108 @@
+# Simple Squiggle
+
+## About
+
+![](imgs/simple-rick.jpg)
+
+"Simple Squiggle" is a simple parser that manipulates multiplications and divisions between numbers and lognormal. It uses a very restricted subset of Squiggle's syntax, and unlike it, it is not easily extensible. It may be useful for testing correctness of limited features of the full Squiggle.
+
+![](imgs/simple-squiggle.png)
+
+## Built with
+
+- [Node.js](https://nodejs.org/en/)
+- [Math.js](https://mathjs.org/)
+- [Best Readme template](https://github.com/othneildrew/Best-README-Template/blob/master/README.md)
+
+## Getting started
+
+### Prerequisites
+
+- npm
+- nodejs
+
+### Installation
+
+```
+git clone https://github.com/quantified-uncertainty/simple-squiggle.git
+cd simple-squiggle
+## npm install
+```
+
+The last line is not necessary, since I'm saving node_packages in the repository.
+
+## Usage
+
+Consider a squiggle model which only uses lognormals:
+
+```
+initialPrisonPopulation = 1.8M to 2.5M # Data for 2022 prison population has not yet been published, though this estimate is perhaps too wide.
+reductionInPrisonPopulation = 0.25 to 0.75
+badnessOfPrisonInQALYs = 0.2 to 5 # 80% as good as being alive to 5 times worse than living is good
+accelerationInYears = 5 to 50
+probabilityOfSuccess = 0.01 to 0.1 # 1% to 10%.
+estimateQALYs = leftTruncate(
+    initialPrisonPopulation *
+    reductionInPrisonPopulation *
+    badnessOfPrisonInQALYs *
+    accelerationInYears *
+    probabilityOfSuccess
+    , 0)
+cost = 2B to 20B
+costEffectivenessPerQALY = leftTruncate(cost / estimateQALYs, 0)
+costEffectivenessPerQALY
+```
+
+It can be simplified to the following simple squiggle model:
+
+```
+( 2000000000 to 20000000000 ) / ( (1800000 to 2500000) * (0.25 to 0.75) * (0.2 to 5) * (5 to 50) * (0.01 to 0.1) )
+```
+
+I provide both an exportable library and a command line interface (cli). The cli can be run with `npm run cli`, which produces a prompt:
+
+```
+> npm run cli
+
+Model:
+```
+
+After filling in the prompt
+
+```
+> npm run cli
+
+Model: ( 2000000000 to 20000000000 ) / ( (1800000 to 2500000) * (0.25 to 0.75) * (0.2 to 5) * (5 to 50) * (0.01 to 0.1) )
+```
+
+the output looks as follows:
+
+```
+> npm run cli
+
+Model: ( 2000000000 to 20000000000 ) / ( (1800000 to 2500000) * (0.25 to 0.75) * (0.2 to 5) * (5 to 50) * (0.01 to 0.1) )
+
+        = (lognormal(22.57, 0.70)) / ((lognormal(14.57, 0.10)) * (lognormal(-0.84, 0.33)) * (lognormal(0.00, 0.98)) * (lognormal(2.76, 0.70)) * (lognormal(-3.45, 0.70)))
+        -> lognormal(22.57, 0.70) / (lognormal(14.57, 0.10) * lognormal(-0.84, 0.33) * lognormal(0.00, 0.98) * lognormal(2.76, 0.70) * lognormal(-3.45, 0.70))
+        -> lognormal(22.57, 0.70) / (lognormal(13.73, 0.35) * lognormal(0.00, 0.98) * lognormal(2.76, 0.70) * lognormal(-3.45, 0.70))
+        -> lognormal(22.57, 0.70) / (lognormal(13.73, 1.04) * lognormal(2.76, 0.70) * lognormal(-3.45, 0.70))
+        -> lognormal(22.57, 0.70) / (lognormal(16.49, 1.25) * lognormal(-3.45, 0.70))
+        -> lognormal(22.57, 0.70) / (lognormal(13.04, 1.43))
+        -> lognormal(22.57, 0.70) / lognormal(13.04, 1.43)
+        -> lognormal(9.53, 1.60)
+
+=> lognormal(9.530291704996749, 1.596443005980748)
+----------------------------------------------------
+```
+
+For ease of representation, the intermediary outputs are printed only to two decimal points. But this is just a display decision; the innards of the program work with the full set of decimals.
+
+You can also run tests with `npm run test`
+
+## Roadmap
+
+I consider this repository to be feature complete. As such, I may tinker with the wrapper to make it a bit less hacky, but I don't really intend to add further functionality.
+
+## License
+
+Distributed under the MIT License
diff --git a/imgs/simple-rick.jpg b/imgs/simple-rick.jpg
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diff --git a/imgs/simple-squiggle.png b/imgs/simple-squiggle.png
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diff --git a/package.json b/package.json
index 22cc05c..97835cd 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,8 @@
   "main": "index.js",
   "type": "module",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "node src/tests.js",
+    "cli": "node src/cli.js"
   },
   "author": "",
   "license": "ISC",
diff --git a/cli.js b/src/cli.js
similarity index 94%
rename from cli.js
rename to src/cli.js
index a0018a9..b8d4a0e 100644
--- a/cli.js
+++ b/src/cli.js
@@ -9,7 +9,7 @@ let print = (x) => {
 };
 
 let runTransformer = (string) => {
-  console.log(`Received: ${string}`);
+  // console.log(`Received: ${string}`);
   console.group();
   print("");
   let result = transformer(string, print);
diff --git a/index.js b/src/index.js
similarity index 98%
rename from index.js
rename to src/index.js
index 226fd8e..fe093d6 100644
--- a/index.js
+++ b/src/index.js
@@ -227,7 +227,7 @@ export function transformer(string, print = console.log) {
   let stringNew = transformerOutput.toString();
   while (stringNew != string) {
     print(
-      `\t->: ${transformerOutput.toString({ handler: customToStringHandler })}`
+      `\t-> ${transformerOutput.toString({ handler: customToStringHandler })}`
     );
     string = stringNew;
     transformerOutput = transformerInner(string);
diff --git a/tests.js b/src/tests.js
similarity index 87%
rename from tests.js
rename to src/tests.js
index 6845e5a..c22303f 100644
--- a/tests.js
+++ b/src/tests.js
@@ -1,6 +1,6 @@
 import { transformer } from "./index.js";
 
-let VERBOSE = false;
+let VERBOSE = true;
 let print = (x) => {
   if (VERBOSE) {
     console.log(x);
@@ -19,7 +19,7 @@ let testTransformer = (string) => {
   console.log("");
 };
 
-// Defs
+// Define tests
 let tests1 = [
   `lognormal(1,10) * lognormal(1,10) + lognormal(1,10)`,
   `lognormal(1,10) * lognormal(1,10) * lognormal(1,10)`,
@@ -32,11 +32,6 @@ let tests1 = [
   `lognormal(1, 10) * 1 to 20 / 1 to 20`,
   `1 to 20 * 100 to 1000 / 1 to 100`,
 ];
-let runTests1 = false;
-if (runTests1) {
-  console.clear();
-  tests.forEach((test) => testTransformer(test));
-}
 
 let tests2 = [
   `3 * lognormal(1,10)`,
@@ -47,28 +42,35 @@ let tests2 = [
   `lognormal(1, 10) / (1 to 3)`,
 ];
 
-let runTests2 = false;
-if (runTests2) {
-  console.clear();
-  tests2.forEach((test) => testTransformer(test));
-}
-
 let tests3 = [
   `(lognormal(1,10))`,
   `lognormal(1,10) * (lognormal(1, 10) * 3) / (4 * lognormal(1,10))`,
 ];
-let runTests3 = false;
-if (runTests3) {
-  console.clear();
-  tests3.forEach((test) => testTransformer(test));
-}
 
 let tests4 = [
   `(1 to 2) * 3 * lognormal(1,10) * (1/lognormal(1,10)) / (1 to 10)`,
   `lognormal(2.4451858789480823, 10.002219515733781) * lognormal(-1, 10) `,
 ];
+
+// Run tests
+console.log("\n".repeat(10));
+console.clear();
+let runTests1 = true;
+if (runTests1) {
+  tests1.forEach((test) => testTransformer(test));
+}
+
+let runTests2 = true;
+if (runTests2) {
+  tests2.forEach((test) => testTransformer(test));
+}
+
+let runTests3 = true;
+if (runTests3) {
+  tests3.forEach((test) => testTransformer(test));
+}
+
 let runTests4 = true;
 if (runTests4) {
-  console.clear();
   tests4.forEach((test) => testTransformer(test));
 }