# Blockly > Demos > Accessible Blockly

This is a demo of a version of Blockly designed for screen readers, optimized for NVDA on Firefox. It allows users to create programs in a workspace by manipulating groups of blocks.

- To explore a group of blocks, use the arrow keys.
- To navigate between groups, use Tab or Shift-Tab.
- To add new blocks, use the buttons in the menu on the right.
- To delete or add links to existing blocks, press Enter while you're on that block.

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