diff --git a/.bin/256color b/.bin/256color
new file mode 100755
index 0000000..c33cd1f
--- /dev/null
+++ b/.bin/256color
@@ -0,0 +1,38 @@
+#! /bin/sh
+set -euf
+
+pl() {
+  for i in $(seq $1 $(expr $2 - 1)); do
+    printf '\e[38;5;%sm%03i\e[m ' $i $i
+  done
+  printf '\e[38;5;%sm%03i\e[m\n' $2 $2
+}
+
+p() {
+  printf '\e[38;5;%sm%03i\e[m ' $1 $1
+}
+pn() {
+  printf '\e[38;5;%sm%03i\e[m\n' $1 $1
+}
+
+p6x6() {
+  for i in $(seq 0 5); do
+    for j in $(seq 0 5); do
+      p $(expr $1 + $i + $j \* 6)
+    done
+    echo
+  done
+}
+
+pl 0 7
+pl 8 15
+
+p6x6 16
+p6x6 52
+p6x6 88
+p6x6 124
+p6x6 160
+p6x6 196
+
+pl 232 243
+pl 244 255
diff --git a/.bin/countdown b/.bin/countdown
new file mode 100755
index 0000000..7408778
--- /dev/null
+++ b/.bin/countdown
@@ -0,0 +1,13 @@
+#!/usr/bin/env -S awk -f
+function z() {
+  getline < "/proc/uptime"
+  close("/proc/uptime")
+  return $0
+}
+BEGIN {
+  x = z()
+  while (1) {
+    y = z()
+    printf "%02d:%05.2f\r", (y - x) / 60, (y - x) % 60
+  }
+}
diff --git a/.bin/pdf-ocr.sh b/.bin/pdf-ocr.sh
new file mode 100755
index 0000000..66f56c3
--- /dev/null
+++ b/.bin/pdf-ocr.sh
@@ -0,0 +1,23 @@
+#!/usr/bin/env nix-shell
+#! nix-shell -i bash -p poppler_utils tesseract4
+set -eu
+
+pdf_path="$(realpath "$1")"
+
+[ -f "$pdf_path" ] || {
+  echo "Usage: $0 FILE.pdf" >&2
+  exit 1
+}
+
+
+tmpdir="$(mktemp -d)"
+trap 'rm -rf $tmpdir' EXIT
+
+cd "$tmpdir"
+
+pdftoppm -png "$pdf_path" pdf-ocr
+for png in pdf-ocr*.png; do
+  tesseract "$png" "$png.txt" 2>/dev/null
+done
+
+cat pdf-ocr-*.txt