Bingo numbers for Google Apps Script

bingo.gs

var minNum = 1 // The minimum bingo number
var maxNum = 15 // The maximum bingo number
var numRows = 3 // The number of bingo sheet rows
var numCols = 3 // The number of bingo sheet columns

// The list of left top point of a bingo sheet in format of spreadsheet rows and columns number
var startingPoints = [
  {"row":4,"col":2},
  {"row":4,"col":6},
  {"row":11,"col":2},
  {"row":11,"col":6},
  {"row":18,"col":2},
  {"row":18,"col":6},
]

// refs:
// https://developers.google.com/apps-script/reference/spreadsheet/spreadsheet-app
// https://developers.google.com/apps-script/reference/spreadsheet/sheet
// https://developers.google.com/apps-script/reference/spreadsheet/range
function main() {
  var sheet = SpreadsheetApp.getActiveSheet();
  startingPoints.forEach(function(p){
    values = getValues()
    range = sheet.getRange(p.row, p.col, numRows, numCols)
    range.setValues(values)
  })
}

function getValues() {
  var values = []
  var exists = {}
  for (i = 0; i < numRows; i++) {
    values[i] = []
    for (j = 0; j < numCols; j++) {
      while (true) {
        n = getRandomInt(minNum, maxNum)
        if (!exists[n]) {
          values[i][j] = n
          exists[n] = true
          break;
        }
      }
    }
  }
  return values
}

function getRandomInt(min, max) {
  return Math.floor(Math.random() * (max - min + 1)) + min; //The minimum and maximum are inclusive
}