https://snap.berkeley.edu/project?username=nat1&projectname=ConcentricSquaresLab
ConcentricSquaresLab by nat1 | Snap! Build Your Own Blocks
The Snap! Community. Snap! is a blocks-based programming language built by UC Berkeley and used by hundreds of thousands of programmers around the world.
build your ownsnapblocks
https://snap.berkeley.edu/project?username=emilyzinn&projectname=3.16%20ConcentricSquaresLab
3.16 ConcentricSquaresLab by emilyzinn | Snap! Build Your Own Blocks
The Snap! Community. Snap! is a blocks-based programming language built by UC Berkeley and used by hundreds of thousands of programmers around the world.
build your ownsnapblocks