flowchart LR
  entity((Entity))
  interact[[Interact]]
  perception[Perception]
  action[Action]
  activities[Activities]

  entity <--> interact
  interact --> action
  action --> activities
  activities --> perception
  perception --> interact

  subgraph Interaction
    perception
    action
  end

  subgraph Now
    activities
  end

  click entity href "/elements/entity"
  click action href "/elements/action"
  click perception href "/elements/perception"
  click activities href "/elements/activity"