Hello! We are happy to announce a new series of online Bonsai workshops! Modern behavioral neuroscience experiments require us to synchronize multiple data streams, precisely deliver stimuli, and – quite often – do everything in a closed-loop setting. The fact that different devices use different software doesn’t make this task any easier. One of the best – and open – solutions to these challenges is *Bonsai*, a reactive programming language that allows you to collect data from multiple systems – from calcium imaging and sound recordings to sensors and control of output devices such as feeders, motors, or stimulus delivery systems. It is easy to learn, easy to implement, and robust. We will run the workshop in three parts: *Part I* – where we will introduce the basic logic of Bonsai, cover loading and saving data, working with cameras to track animals, and the basics of closed-loop experiments. *Part II* – where we will show you more advanced aspects of Bonsai: working with behavioral subjects, combining different data streams, and using the BonVision library to generate visual stimuli. *Part III* – where we will cover using Arduino alongside Bonsai to control experimental equipment and save data from your sensors. The first workshop – *Introduction to Bonsai* – will take place on *April 25th, 9:30 AM – 11:30 AM CET*. You can find the application form here: https://nenckiopenlab.org/bonsai-online/. The fee for each workshop is *EUR 23*. *Requirements:* Windows computer, webcam Best, Mateusz Kostecki -- --- Mateusz Kostecki PhD Student Knapska Laboratory Nencki Institute 02-093 Warsaw, Pasteura 3, Poland https://twitter.com/mtkostecki https://evolvingbehavior.blog/