diff --git a/.gitignore b/.gitignore
index f4ceea7..bb34ff2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,14 @@
 **/target/
+
+
+# Added by cargo
+
+/target
+
+
+# Added by cargo
+#
+# already existing elements were commented out
+
+#/target
+Cargo.lock
diff --git a/2021/Cargo.lock b/2021/Cargo.lock
index 8464c49..3c24dd1 100644
--- a/2021/Cargo.lock
+++ b/2021/Cargo.lock
@@ -2,10 +2,22 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "advent"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "aoc-runner",
+ "aoc-runner-derive",
+ "pretty_assertions",
+ "thiserror",
+]
+
 [[package]]
 name = "advent2021"
 version = "0.1.0"
 dependencies = [
+ "advent",
  "ansi_term",
  "anyhow",
  "aoc-runner",
diff --git a/2021/Cargo.toml b/2021/Cargo.toml
index 957d90a..166fb98 100644
--- a/2021/Cargo.toml
+++ b/2021/Cargo.toml
@@ -12,3 +12,4 @@ aoc-runner = "0.3.0"
 aoc-runner-derive = "0.3.0"
 pretty_assertions = "1.0.0"
 thiserror = "1.0.30"
+advent = { path = "../" }
diff --git a/2021/src/day13.rs b/2021/src/day13.rs
index 3eda843..40cec65 100644
--- a/2021/src/day13.rs
+++ b/2021/src/day13.rs
@@ -1,13 +1,5 @@
-use std::{
-    fmt::{Debug, Error, Formatter},
-    num::ParseIntError,
-    ops::{Index, IndexMut},
-    str::FromStr,
-};
-
-use anyhow::Result;
-use aoc_runner_derive::{aoc, aoc_generator};
-use thiserror::Error;
+use advent::prelude::*;
+use aoc_runner_derive::aoc;
 
 struct Image {
     width: usize,
@@ -182,7 +174,7 @@ fn part2(input: &str) -> Result<usize> {
 mod tests {
     use super::*;
 
-    //#[test]
+    #[test]
     fn test_part1() -> Result<()> {
         let input = r#"
 6,10
diff --git a/2021/src/day15.rs b/2021/src/day15.rs
index 9a899be..c46e09e 100644
--- a/2021/src/day15.rs
+++ b/2021/src/day15.rs
@@ -1,15 +1,5 @@
-use std::{
-    collections::{HashMap, HashSet, VecDeque},
-    convert::Infallible,
-    fmt::{Debug, Error, Formatter},
-    num::ParseIntError,
-    ops::{Index, IndexMut},
-    str::FromStr,
-};
-
-use anyhow::Result;
-use aoc_runner_derive::{aoc, aoc_generator};
-use thiserror::Error;
+use advent::prelude::*;
+use aoc_runner_derive::aoc;
 
 struct Image {
     width: usize,
diff --git a/2021/src/day16.rs b/2021/src/day16.rs
index e21d33c..92f164e 100644
--- a/2021/src/day16.rs
+++ b/2021/src/day16.rs
@@ -1,14 +1,5 @@
-use std::{
-    fmt::{Debug, Error, Formatter},
-    io::Read,
-    num::ParseIntError,
-    ops::{Index, IndexMut},
-    str::FromStr,
-};
-
-use anyhow::Result;
-use aoc_runner_derive::{aoc, aoc_generator};
-use thiserror::Error;
+use advent::prelude::*;
+use aoc_runner_derive::aoc;
 
 fn hex(b: &u8) -> u8 {
     if *b >= b'A' {
diff --git a/2021/src/lib.rs b/2021/src/lib.rs
index c959bfc..e64251e 100644
--- a/2021/src/lib.rs
+++ b/2021/src/lib.rs
@@ -3,7 +3,7 @@ pub mod day10;
 pub mod day11;
 pub mod day12;
 pub mod day13;
-pub mod day14;
+//pub mod day14;
 pub mod day15;
 pub mod day16;
 pub mod day2;
diff --git a/2021/src/template.rs b/2021/src/template.rs
index ed18fea..11dee2e 100644
--- a/2021/src/template.rs
+++ b/2021/src/template.rs
@@ -1,13 +1,5 @@
-use std::{
-    fmt::{Debug, Error, Formatter},
-    num::ParseIntError,
-    ops::{Index, IndexMut},
-    str::FromStr,
-};
-
-use anyhow::Result;
+use advent::prelude::*;
 use aoc_runner_derive::{aoc, aoc_generator};
-use thiserror::Error;
 
 #[aoc(dayX, part1)]
 fn part1(input: &str) -> Result<usize> {
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..5125c1f
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,16 @@
+[package]
+name = "advent"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+anyhow = "1.0.45"
+aoc-runner = "0.3.0"
+aoc-runner-derive = "0.3.0"
+pretty_assertions = "1.0.0"
+thiserror = "1.0.30"
+
+[lib]
+name = "advent"
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..e4f4209
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,13 @@
+pub mod prelude {
+    pub use std::{
+        convert::Infallible,
+        fmt::{Debug, Error, Formatter},
+        io::Read,
+        num::ParseIntError,
+        ops::{Index, IndexMut},
+        str::FromStr,
+    };
+
+    pub use anyhow::Result;
+    pub use thiserror::Error;
+}