diff --git a/README.md b/README.md
index 86f25e2..93f223f 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,5 @@
 # Fortuna
+The quick solution for everything random!
 
 A Gacha-like system to roll random items with weights.
 
diff --git a/deno.json b/deno.json
index 5ddef40..3820d9e 100644
--- a/deno.json
+++ b/deno.json
@@ -1,6 +1,16 @@
 {
-    "tasks": {
-        "bench": "deno bench --unstable benches/comparison.ts",
-        "test": "deno test test.ts"
+    "bench": {
+        "files": {
+            "include": [
+                "./benches/comparison.ts"
+            ]
+        }
+    },
+    "test": {
+        "files": {
+            "include": [
+                "./test.ts"
+            ]
+        }
     }
 }
\ No newline at end of file
diff --git a/deno.lock b/deno.lock
index b8f45bc..f5be2f9 100644
--- a/deno.lock
+++ b/deno.lock
@@ -5,6 +5,13 @@
     "https://deno.land/std@0.190.0/testing/_diff.ts": "1a3c044aedf77647d6cac86b798c6417603361b66b54c53331b312caeb447aea",
     "https://deno.land/std@0.190.0/testing/_format.ts": "a69126e8a469009adf4cf2a50af889aca364c349797e63174884a52ff75cf4c7",
     "https://deno.land/std@0.190.0/testing/asserts.ts": "e16d98b4d73ffc4ed498d717307a12500ae4f2cbe668f1a215632d19fcffc22f",
+    "https://deno.land/x/fortuna@v4.0.0/benches/comparison.ts": "4240603a03c69dc0316ca92f019e8f17ded9ef8fbd9f53ac1a9a11c66dbadae0",
+    "https://deno.land/x/fortuna@v4.0.0/mod.ts": "f9a42cb7bb879d2ce1f1e0bf52716c620ee71a9f67769bef8887cbf8d9a918f0",
+    "https://deno.land/x/fortuna@v4.0.0/src/die.ts": "20261238db73c895204408e7d030b6650f0df03d2c77f522cb6bfbe79701ec9c",
+    "https://deno.land/x/fortuna@v4.0.0/src/limited_machine.ts": "d4103726625ac387fa6499a202324985f59e8dc6f52f18c91a51515d4709c9b6",
+    "https://deno.land/x/fortuna@v4.0.0/src/machine.ts": "1772a67f974120238e03d99bf0e924a24c88ba9d9e13b81f40c6f9327774da65",
+    "https://deno.land/x/fortuna@v4.0.0/src/roll.ts": "dbe1eac702bb3e2fd152397c74cc1e4dfbde2dc02a331c12dc192da5739d0387",
+    "https://deno.land/x/fortuna@v4.0.0/testdata/pokemon.json": "6dac3378ac42eab9175145915cab85e5a959fa044686f43459d2da205625f386",
     "https://deno.land/x/masx200_weighted_randomly_select@2.1.1/mod.ts": "5d7fee96350e0df360363b8b5b3c784251248e6dfcc355c7e0639cb20a1e895b",
     "https://deno.land/x/masx200_weighted_randomly_select@2.1.1/src/index.ts": "7441a8a37df57a178fd1dd6b08de9eb192899a4068622b63b50995e1e7a89ad5",
     "https://deno.land/x/wrand@v1.2.0/index.ts": "5c9977efa424a8efffc1e0d29b8d9ef81a6009c0362c303d87030b320aa58a55",
diff --git a/dist/coin.js b/dist/coin.js
new file mode 100644
index 0000000..d84b75b
--- /dev/null
+++ b/dist/coin.js
@@ -0,0 +1,10 @@
+// deno-fmt-ignore-file
+// deno-lint-ignore-file
+// This code was bundled using `deno bundle` and it's not recommended to edit it manually
+
+function unbiasedCoin(n = 1) {
+    const upperBound = 1 << n;
+    const res = Math.floor(Math.random() * upperBound).toString(2).padStart(n, "0");
+    return res.split("").map((x)=>x === "0" ? "H" : "T");
+}
+export { unbiasedCoin as unbiasedCoin };
diff --git a/mod.ts b/mod.ts
index 96bebdf..f0a9950 100644
--- a/mod.ts
+++ b/mod.ts
@@ -2,3 +2,4 @@ export { GachaMachine } from "./src/machine.ts";
 export { LimitedGachaMachine } from "./src/limited_machine.ts";
 export { rollDie } from "./src/die.ts";
 export { roll } from "./src/roll.ts";
+export { unbiasedCoin } from "./src/coin.ts"
\ No newline at end of file
diff --git a/src/coin.ts b/src/coin.ts
new file mode 100644
index 0000000..37a15ca
--- /dev/null
+++ b/src/coin.ts
@@ -0,0 +1,12 @@
+// A biased coin can be implemented using GachaMachine.
+
+/**
+ * Toss n unbiased coins (50% chance of head / tail).
+ * @param n Number of coins to toss.
+ * @returns Array of results. Returns "H" for head and "T" for tail.
+ */
+export function unbiasedCoin(n = 1): ("H" | "T")[] {
+    const upperBound = 1 << n
+    const res = Math.floor(Math.random() * upperBound).toString(2).padStart(n, "0")
+    return res.split("").map(x => x === "0" ? "H" : "T")
+}
\ No newline at end of file
diff --git a/src/die.ts b/src/die.ts
index 87638bc..f7bdc74 100644
--- a/src/die.ts
+++ b/src/die.ts
@@ -1,3 +1,5 @@
+// A biased die can be implemented using GachaMachine.
+
 export interface DieConfig {
   times: number;
   face: number;
diff --git a/test.ts b/test.ts
index 9200bc8..bf46abe 100644
--- a/test.ts
+++ b/test.ts
@@ -6,6 +6,7 @@ import {
   assertThrows,
 } from "https://deno.land/std@0.190.0/testing/asserts.ts";
 import { GachaMachine, LimitedGachaMachine, roll, rollDie } from "./mod.ts";
+import { unbiasedCoin } from "./src/coin.ts";
 
 const testData = [
   { result: "SSR cool character", chance: 1 },
@@ -183,6 +184,22 @@ Deno.test({
   },
 });
 
+Deno.test({
+  name: `Toss an unbiased coin (should return ["H"] or ["T"])`,
+  fn() {
+    const res = unbiasedCoin();
+    assert(res.length === 1 && res[0] === "H" || res[0] === "T");
+  },
+});
+
+Deno.test({
+  name: `Toss N unbiased coins (should return an array of "H" or "T")`,
+  fn() {
+    const res = unbiasedCoin();
+    assert(res.length === 1 && res.every((x) => x === "H" || x === "T"));
+  },
+});
+
 /*
 Deno.test({
     name: `${sortedTestData[0].chance} in ${testData.reduce((acc, val) => acc + val.chance, 0)} rolls return a ${sortedTestData[0].result}?`,