How to connect blocks with arrows glued to them. This animation is a simplified view. In the practice session coming up, you'll see many more shapes than you see here.
Want to show how ideas go together? It's easy: connect the blocks. Click Play to see an animation of how to do that.
Notice how an arrow's endpoint turns red when positioned over a block's connection point. This means that the endpoint is glued to the block. Gluing the arrow's other endpoint to a connection point on the next block will keep those blocks firmly linked.