diff --git a/Cargo.lock b/Cargo.lock
index 1ab7cc3..83a0c42 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -431,6 +431,7 @@ dependencies = [
  "minifb",
  "nix 0.30.1",
  "vte",
+ "zeno",
 ]
 
 [[package]]
@@ -794,6 +795,12 @@ version = "0.8.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3ae8337f8a065cfc972643663ea4279e04e7256de865aa66fe25cec5fb912d3f"
 
+[[package]]
+name = "zeno"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6df3dc4292935e51816d896edcd52aa30bc297907c26167fec31e2b0c6a32524"
+
 [[package]]
 name = "zmij"
 version = "1.0.14"
diff --git a/Cargo.toml b/Cargo.toml
index 1c3ed4f..d6a6f8f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,3 +7,4 @@ edition = "2024"
 minifb = "0.28.0"
 nix = {default-features = false, features=["term","process","fs"], version="0.30.1"}
 vte = "0.15.0"
+zeno = "0.3.3"
diff --git a/src/main.rs b/src/main.rs
index 3b6518e..fb5f90d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -9,6 +9,8 @@ use std::ffi::CString;
 
 use vte::{Params, Parser, Perform};
 
+use zeno::{Join, Mask, Stroke};
+
 // window stuff
 const WIDTH: usize = 640;
 const HEIGHT: usize = 360;
@@ -79,9 +81,21 @@ fn main() {
     let mut buf = [0u8; 2048];
 
     while window.is_open() && !window.is_key_down(Key::Escape) {
+
+        let mask = Mask::new("M 8,56 32,8 56,56 Z")
+            .size(WIDTH.try_into().unwrap(), HEIGHT.try_into().unwrap())
+            .style(Stroke::new(8.0).join(Join::Round))
+            .render()
+            .0;
+
         // windowing stuff
-        for i in buffer.iter_mut() {
-            *i = 0;
+        for (p, a) in buffer.iter_mut().zip(mask.iter()) {
+            let a0 = *a as u32;
+            *p = a0 << 24 | 0x00FF0000;
+            *p =
+                if a0 > 0
+                { a0 << 16 | a0 << 8 | a0 }
+                else { 0x00000000 };
         }
         let keys = window.get_keys_pressed(KeyRepeat::No);
         window.update_with_buffer(&buffer, WIDTH, HEIGHT).unwrap();