add author & license

TheKitty · web-flow · commit f42b8a894d1d · 2021-09-29T17:25:25.000-04:00
diff --git a/2020_shake/2021.h b/2020_shake/2021.h
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2020 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
 const uint8_t PROGMEM bitmap_2021[] = {
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
