set_or_increment_lucky_better_variable

set_or_increment_lucky_better_variable = {
	if = {
		limit = {
			NOT = { has_variable = lucky_bet_counter }
		}
		set_variable = {
			name = lucky_bet_counter
			value = 1
		}
	}
	else = {
		change_variable = {
			name = lucky_bet_counter
			add = 1
		}
		if = {
			limit = {
				var:lucky_bet_counter >= 5
				has_any_nickname = no
			}
			send_interface_toast = {
				# works for our purposes "New Nickname"
				title = sell_titles_nickname_gained
				left_icon = this
				give_nickname = nick_the_lucky
			}
		}
	}
}

As written in game/common/scripted_effects/07_dlc_ep3_scripted_effects.txt.