diff --git a/flash.sh b/flash.sh
new file mode 100644
index 0000000000..e66e9b2d09
--- /dev/null
+++ b/flash.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+[ -z "$1" ] && exit 1
+doas avrdude -p atmega32u4 -c avr109 -U flash:w:"$1"