Write code.
Move robots.

# Joyride: a DualShock 4 drives the Build HAT's two motors, one per stick.
namespace joyride

import grandtheorem.rpi.Pi
import grandtheorem.rpi.DualShock4
import grandtheorem.buildhat.BuildHat

entrypoint.default joyride() {
  let hat = BuildHat(Pi)
  let wheels = Wheels(hat.motor(0), hat.motor(1))
  let pad = DualShock4()

  while (true) {
    wheels.drive(pad)
  }
}

# Wheels is the other tab: one turn of drive() sends a motor a new speed only when
# its stick moves, and stops both when the pad goes quiet.