# visible.ludic — L3: a program in no module uses what module bank exports: a function to call
# and an event to listen to. Its private `add` and `balance` stay out of reach.
#
# Running it prints:  42 42
import "bank"
program Visible {
  var heard: int = 0
  @On(Deposited) handler Heard { heard += amount }
  entry {
    deposit(30)
    deposit(12)
    print(`{total()} {heard}`)
  }
}