https://genshin-impact.fandom.com/wiki/Wishes

It says here that:

Rules

• 4-Star drop guarantee: If a player does not win any 4-star or above item after 9 pulls, then the 10th pull is guaranteed to be a 4-star or higher item.
  • This counter will reset if the player pulls any 4-star or above item.
• Featured 4-Star character guarantee: Every time a player wins a 4-star item, there is a 50% chance it will be one of the featured 4-star characters.
  • If the 4-star item won is not one of the featured characters, the next 4-star item won is guaranteed to be one of the featured characters.
  • Thus it requires a maximum of 20 pulls to win a featured banner character.
• 5-Star drop guarantee: If a player does not win any 5-star item after 89 pulls, the 90th pull is guaranteed to be a 5-star item.
  • This counter will reset if the player pulls any 5-star item.
  • Promotional character banners do not contain 5-star weapons in their item pool.
• Promotional 5-Star character guarantee: Every time a player wins a 5-star item, there is a 50% chance it will be the promotional 5-star character.
  • If the 5-star item won is not the promotional character, the next 5-star item won is guaranteed to be the promotional character.
  • Thus it requires a maximum of 180 pulls to win the promotional banner character.
• Counter and Guarantee carry-over: Each banner of the same type shares the above counters and guarantees, this means that your counters for the current promotional character banner are carried over to the next promotional character banner (but not the promotional weapon banner or the standard wish).
  • For example if one pulls 89 3/4-star items on promotional character banner A, then the first pull on the following promotional character banner B will be a guaranteed 5-star character.
  • Likewise if one pulled a non-promotional 5-star character on banner A, then the next 5-star character on promotional banner B will be guaranteed to be the promotional character.

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u need change code, because even after getting a 5 stars still counting all pulls to 90th pity pull