function main() {

    // Get all the accounts 
    var accountIterator = AccountsApp.accounts().get();

    // Iterate through all the accounts in the results
    while (accountIterator.hasNext()) {

        // Get one of the accounts from the list of all accounts  
        var account = accountIterator.next();

        // Select the account to update
        AccountsApp.select(account);

        // Retrieve all the keywords that have greater than 2% conversion last week
        // and are in Ad group with names that contain 'sale'
        var keywordIterator = BingAdsApp.keywords()
            .withCondition("AdGroupName CONTAINS_IGNORE_CASE 'sale'")
            .withCondition("ClickConversionRate > 2")
            .forDateRange("LAST_WEEK")
            .get();

        // Iterate through all ads in the results
        while (keywordIterator.hasNext()){
            var keyword = keywordIterator.next();

            // Get current bid
            var currentBid = keyword.bidding().getCpc();

            // Set new bid with 5% increment
            keyword.bidding().setCpc(currentBid * 1.05);
        }

        // Retrieve all the keywords that have less than or equal to 2% conversion last week
        // and are in Ad group with names that contain 'sale'
        var keywordIterator = BingAdsApp.keywords()
            .withCondition("AdGroupName CONTAINS_IGNORE_CASE 'sale'")
            .withCondition("ClickConversionRate <= 2")
            .forDateRange("LAST_WEEK")
            .get();

        // Iterate through all ads in the results
        while (keywordIterator.hasNext()){
            var keyword = keywordIterator.next();

            // Get current bid
            var currentBid = keyword.bidding().getCpc();

            // Set new bid with 5% decrement
            keyword.bidding().setCpc(currentBid * 0.95);
        }
    }
}