Interactive 3D world for level 2.1. Hold Control or Command and drag to orbit or scroll to zoom. Touch users can drag or pinch.

Ctrl / ⌘ + drag to orbit · Ctrl / ⌘ + scroll to zoomDrag to orbit · Pinch to zoom

LESSON 2.1

Named Boxes

A mut variable is a named box whose contents can change.

Goal Show the counter in the data panel: first 0 , then 5 , then 8 .

Write a Zirk program, then run it to see the world react.
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