Besides Orca, Befunge, etc.. the McCulloch-Pitts Neuron is a graphical language with a discrete timestep, it solves some of the shortcomings of Orca and Recto where the evaluation has to do a lot of walking to traverse space.

https://www.i-programmer.info/babbages-bag/325-mcculloch-pit...

It does so by creating instant connection between events across large distances.

Its inerrant parallalelism makes it also possible to do pretty complex evaluation on large canvases.