function sendtoslack() {
  var today = new Date();
  
  Logger.log(today);

  var url = "https://hooks.slack.com/services/T03FE7QJV/당신의웹훅URL"; 

  var sheet = SpreadsheetApp.getActive().getSheetByName('list');
  var dataRange = sheet.getDataRange();
  var values = dataRange.getValues();
  
  var searchValue = "0";
  var updateValue = "1";
  var updateColumn = 1; // the column number to update
  
  var updateRow = -1; // initialize to -1 to indicate value not found

  var totalCount = values.length;
  var currentCount = 0;
  
  for (var i = 0; i < values.length; i++) {
    currentCount++;
    if (values[i][0] == searchValue) {
      updateRow = i + 1; // add 1 to convert from 0-indexed to 1-indexed
      break;
    }
  }
  
  if (updateRow != -1) {
    var rangeToUpdate = sheet.getRange(updateRow, updateColumn, 1, 1);
    rangeToUpdate.setValue(updateValue);
  }

  var values = sheet.getRange(updateRow, updateColumn, 1, 5).getValues();
  var value = values[0];

  var payload = {
    "channel": "#원하는채널명",
    "blocks": [
      {
        "type": "section",
        "text": {
          "type": "mrkdwn",
          "text": "> _점심을 꽤나 둔둔하게 드신 모양이로군._\n> _후식으로 간단한 타입챌린지 하나 풀고가시게._\n"
        }
      },
      {
        "type": "divider"
      },
      {
        "type": "section",
        "text": {
          "type": "mrkdwn",
          "text": `:ts-boom: *[${value[1]}] ${value[2]}* (${currentCount - 2}/${totalCount - 2}) <${value[4]}|🔗>`
        },
        "accessory": {
          "type": "button",
          "style": "primary",
          "text": {
            "type": "plain_text",
            "text": "문제풀러가기🧩",
            "emoji": true
          },
          "url": `https://tsch.js.org/${value[3]}/play/ko`,
        }
      },
      {
        "type": "divider"
      }
    ]
  };

  Logger.log(payload);

  var options = {
    "method": "post",
    "contentType": "application/json",
    "payload": JSON.stringify(payload)
  };
  
  return UrlFetchApp.fetch(url,options);
  }