Hello Block World

For perhaps thousands of years the human race has been excited by constructing a building block world.

Now we can virtually go on constructing for some several thousand years more.

Build your world from a variety of basic building blocks.

Hierarchically group your blocks to form complex structures.

Top slider: cycle through the available basic blocks.
Next five buttons: [add basic], [delete], [select next], [select previous], [clone].
Next five buttons: rotate about [ axis], [ axis], [ axis], and [stretch], [shrink].
Next three buttons: [mark current], [group marked], [ungroup].
, , sliders: shift as desired.

Hints:

To get rid of the default world click [delete] at startup.

[stretch]/[shrink] only works on the axis; for example, to [stretch]/[shrink] along the axis, first rotate about the axis, then [stretch]/[shrink], then rotate back.

Just have fun!