Create a 4-email sequence for a seasonal promotion, such as a [Holiday] sale at [CompanyName]. The first email should announce the sale with an early-bird discount, followed by an email showcasing popular items. The third email should offer last-minute deals or bundles, and the fourth should remind customers of the sale’s expiration date. Use [SeasonalSaleName], [DiscountPercentage], and [ExpiryDate] as placeholders.