Wave Structure of Matter
The work of Gabriel La Freniere
Please note that these are actually 2-dimensional representations of the real 3-dimensional wave structures in nature.
The sum of inward and outward concentric waves makes a standing wave.
When the centre is moving, then the inward and outward waves are displaced in opposite directions. The combination then has interference fringes moving across it, as de Broglie predicted.
There are a great deal more animations and explanations at Matter is Made of Waves by Gabriel La Freniere.