瑞士設計師Laetitia Florin在觀察線與網格的互動意象後，創作了Bidum。
基本上，Bidum是一個動態容器。
Laetitia Florin在為Bidum進行創作背景說明時，提到Bidum是一個活生生、能為週遭環境製造幻象的物件。
Bidum was my graduation project at ECAL, Switzerland. My research started with the observation of lines and grids, their interaction and the resulting illusions. I was interested in the way it moved and interfered with the surroundings. Bidum isn’t a still object forgotten down somewhere. It is a living object, that moves and bounces when you touch it, and even when you walk next to it. Movement is what makes Bidum beautiful and fascinating.
顯然，動態在Bidum這個作品裡佔有很重要的地位。
否則，光從線條構成來看，Bidum所能施展的幻象，大概不會超過一顙洋葱。