commit 43057a55d6dd6a34eb61b2b9b04389fe23b93e35
Author: mehbark <terezi@pyrope.net>
Date:   Thu Dec 25 00:13:35 2025 -0500

    initial

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..b81b9aa
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "qr-random"
+version = "0.1.0"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..cf27cce
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "qr-random"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..d00116a
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,23 @@
+use std::env;
+
+fn main() {
+    // try 48413
+    let s: usize = env::args()
+        .nth(1)
+        .expect("give me a number")
+        .parse()
+        .unwrap();
+
+    let p = 2 * s + 1;
+    let mut qr = vec![false; p];
+    for n in 1..p {
+        qr[(n * n) % p] = true;
+    }
+
+    for is_qr in qr {
+        let color_code: u8 = if is_qr { 255 } else { 232 };
+        print!("\x1b[48;5;{color_code}m  ");
+    }
+
+    print!("\x1b[0m");
+}