This project is made with 100% pen. With this you can generate green coloured 3D cubes. Select the correct setting from slider and press the "G" button to generate the voxels grid. Press the "T" button to hide variables and again to show them back. Suprisingly it has only 1 sprite with no costume and no backdrops, all the things on stage are pen made, even the shapes, the generate button and backdrop.
All credits to me, I created all the project engine on my own.