VCCC 2023 atto diamonds

Author: pépé / HMD
Category: Christmas Challenge
System:   atto (https://atto.devicefuture.org/)
Language: BASIC
Len source code: 91
Len exe file:    91
Len code only:   91
Instructions:
Launch Pico-8
Double click "pépé_atto_basic_vc3_23.link", or drag and drop it in your favourite browser.
Type "cls" to clear the screen
Type "run" to launch
Type "list" to show the code
Description:
This is a simple double 19 characters loop with with modulo 6
Comments:
Thanks !
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|   ___ _/_ ___ _/_                                 |
|  | . | -_| . | -_|                                |
|  |  _|___|  _|___|                                |
|  |_|     |_|            http://peek.poke.free.fr  |
|               https://demozoo.org/sceners/123351  |
|                                                   |
|    Don't give up, stay Vintage !                  |
+---------------------------------------------------+