add vid 9120 & 9121

Author: takashicompany

1209/9120/index.md

@@ -0,0 +1,9 @@
+---
+layout: pid
+title: Gravity-36
+owner: GreenKeys
+license: CC-BY-NC-ND
+site: https://green-keys.info/
+source: https://drive.google.com/drive/folders/1uQUcPEpWWyN-oy_dpldONlol7jjU-95X
+---
+It is a 36-key DIY split keyboard.

1209/9121/index.md

@@ -0,0 +1,9 @@
+---
+layout: pid
+title: Gravity-45
+owner: GreenKeys
+license: CC-BY-NC-ND
+site: https://green-keys.info/
+source: https://drive.google.com/drive/folders/1e-c62-ID7IzSl4b39KkLNPqCPHoULJKY
+---
+It is a 45-key DIY integrated keyboard.