var readTextFile = function() {
  let min = 60 * 1000, hour = min * 60, day = hour * 24

  let logs = [], year = 2023, start = new Date(year, 8, 21).getTime()
  for (let i = 21; i <= 30; i++) {
    if (i != 27) logs.push({name: "activity-" + year + "-09-" + i + ".log", time: start + i * day, day: (i - 17) % 7})
  }

  let rState = 81782
  function r1() {
    rState ^= rState << 13
    rState ^= rState << 17
    rState ^= rState << 5
    return (rState & 0xffffff) / 0xffffff
  }
  function r(n) {
    return Math.floor(r1() * n)
  }

  let weekday = [1, 1, 1, 1, 1, 3, 8, 20, 10, 15, 15, 20, 25, 12, 15, 20, 18, 16, 10, 8, 8, 7, 4, 2]
  let saturday = [1, 1, 1, 1, 1, 2, 3, 5, 3, 2, 2, 5, 8, 7, 9, 5, 5, 3, 3, 3, 4, 2, 2, 2]
  let sunday = [2, 2, 1, 1, 1, 1, 1, 2, 2, 3, 6, 6, 2, 1, 1, 1, 1, 4, 4, 4, 3, 2, 1, 1]

  let activity = (day, base) => {
    let schedule = day == 0 ? sunday : day == 6 ? saturday : weekday
    let events = []
    for (let h = 0; h < 24; h++) {
      let n = schedule[h] * 2 + r(5) - 2
      for (let i = 0; i < n; i++) {
        let t = base + h * hour + r(hour)
        let j = events.length
        while (j > 0 && events[j - 1] > t) --j
        events.splice(j, 0, t)
      }
    }
    return events
  }

  let generated = false
  function generateLogs() {
    if (generated) return
    generated = true
    for (let log of logs) {
      files[log.name] = activity(log.day, log.time).join("\n")
    }
  }

  let files = {
    __proto__: null,
    "shopping_list.txt": "Peanut butter\nBananas",
    "old_shopping_list.txt": "Peanut butter\nJelly",
    "package.json": '{"name":"test project","author":"cāāw-krö","version":"1.1.2"}',
    "plans.txt": "* Write a book\n  * Figure out asynchronous chapter\n  * Find an artist for the cover\n  * Write the rest of the book\n\n* Don't be sad\n  * Sit under tree\n  * Study bugs\n",
    "camera_logs.txt": logs.map(l => l.name).join("\n")
  }

  return function readTextFile(filename, callback) {
    if (/^activity/.test(filename)) generateLogs()
    let file = filename == "files.list" ? Object.keys(files).join("\n") : files[filename]
    Promise.resolve().then(() => {
      if (file == null) callback(null, "File " + filename + " does not exist")
      else callback(file)
    })
  }
}()

var activityGraph = table => {
  let widest = Math.max(50, Math.max(...table))
  return table.map((n, i) => {
    let width = (n / widest) * 20
    let full = Math.floor(width), rest = " ▏▎▍▌▋▊▉"[Math.floor((width - full) * 8)]
    return String(i).padStart(2, " ") + " " + "█".repeat(full) + rest
  }).join("\n")
}

var joinWifi = function(networkID, code) {
  return new Promise((accept, reject) => {
    setTimeout(() => {
      if (networkID != "HANGAR 2") return reject(new Error("Network not found"))
      let correct = "555555"
      if (code == correct) return accept(null)
      if (!correct.startsWith(code)) return reject(new Error("Invalid passcode"))
    }, 20)
  })
}

var request = function(){
  function error(device) {
    return (req, resolve, reject) => reject(new Error(device + ": malformed request"))
  }

  let hosts = {
    "10.0.0.1": error("ROUTER772"),
    "10.0.0.2": () => {},
    "10.0.0.4": () => {},
    "10.0.0.20": error("Puxel 7"),
    "10.0.0.33": error("jPhone[K]"),
  }

  function screen(n) {
    return (req, resolve, reject) => {
      if (!req || req.command !== "display") {
        reject(new Error("LedTec SIG-5030: INVALID REQUEST " + req?.type))
      } else if (!Array.isArray(req.data) || req.data.length !== 1500) {
        reject(new Error("LedTec SIG-5030: INVALID DISPLAY DATA"))
      } else {
        if (!screens) {
          if (typeof window != "object" || !window.document) return
          screens = new Screens
        }
        setTimeout(() => {
          screens.update(n, req.data)
          resolve({status: "ok"})
        }, 3 + Math.floor(Math.random() * 20))
      }
    }
  }

  ;["10.0.0.44", "10.0.0.45", "10.0.0.41",
    "10.0.0.31", "10.0.0.40", "10.0.0.42",
    "10.0.0.48", "10.0.0.47", "10.0.0.46"].forEach((addr, i) => hosts[addr] = screen(i))

  class Screens {
    constructor() {
      this.getParent()
      let doc = this.parent.ownerDocument
      this.dom = this.parent.appendChild(doc.createElement("div"))
      this.dom.style.cssText = "position: relative; max-width: 500px"
      let inner = this.dom.appendChild(doc.createElement("div"))
      inner.style.cssText = "position: relative; width: 100%; padding-bottom: 60%"
      this.screens = []
      for (let i = 0; i < 9; i++) {
        let screen = inner.appendChild(doc.createElement("div"))
        let row = Math.floor(i / 3), col = i % 3
        screen.style.cssText = "border: 1px solid #222; background: black; position: absolute; width: 33.3%; height: 33.3%; left: " + (col * 33.3) + "%; top: " + (row * 33.3) + "%"
        let canvas = screen.appendChild(doc.createElement("canvas"))
        canvas.style.cssText = "width: 100%; height: 100%"
        this.screens.push(canvas)
      }
      this.screens.forEach(c => { c.width = c.offsetWidth; c.height = c.offsetHeight })
    }

    getParent() {
      this.parent = window.__sandbox ? window.__sandbox.output.div : document.body
    }

    update(n, data) {
      this.getParent()
      if (!this.parent.ownerDocument.body.contains(this.dom)) this.parent.appendChild(this.dom)

      let canvas = this.screens[n], cx = canvas.getContext("2d")
      cx.clearRect(0, 0, canvas.width, canvas.height)
      let gapX = (canvas.width * 0.4) / 51, sizeX = (canvas.width * 0.6) / 50, skipX = gapX + sizeX
      let gapY = (canvas.height * 0.4) / 31, sizeY = (canvas.height * 0.6) / 30, skipY = gapY + sizeY
      for (let i = 0, col = 0, row = 0; i < 1500; i++) {
        let pixel = data[i]
        if (pixel) {
          cx.fillStyle = pixel == 3 ? "#fd4" : pixel == 2 ? "#a82" : "#741"
          cx.fillRect(gapX + col * skipX, gapY + row * skipY, sizeX, sizeY)
        }
        if (col == 49) { col = 0; row++ }
        else { col++ }
      }
    }
  }
  let screens = null

  return function request(address, content) {
    return new Promise((resolve, reject) => {
      let host = hosts[address]
      if (!host) reject(new Error("No route to host " + address))
      else host(JSON.parse(JSON.stringify(content)), resolve, reject)
    })
  }
}()

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    " 5dc",
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].map(frame => frame.map(s => {
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}))