3D Bricks
Build the target with all 8 bricks. Drag a brick across the baseplate to move it on its current layer. Double-click it to turn it 90°. Use Raise and Lower to move it between layers. A red status means bricks collide, float without support, leave the baseplate, or form separate structures.
How marking works. This page checks that your build follows the simple stacking rules. It does not know the target answer. When you submit, the server signs your current build and recent action history. The course grader checks the signature and compares your build with the target.
Move bricks
Arrow keys move the selected brick by one stud. R rotates it. Page Up/Page Down move it one layer.