adding SPDX

BlitzCityDIY · BlitzCityDIY · commit 9685a374a281 · 2023-09-11T11:28:04.000-04:00
diff --git a/Tombstone_Matrix_Prop-Maker/code.py b/Tombstone_Matrix_Prop-Maker/code.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2023 Liz Clark for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 import os
 import random
 import board
