from otree.api import * doc = """ Your app description """ class Constants(BaseConstants): name_in_url = 'introduction' players_per_group = None num_rounds = 1 instructions_template = 'introduction/instructions.html' win_payoff = cu(50) class Subsession(BaseSubsession): pass class Group(BaseGroup): pass class Player(BasePlayer): pass # PAGES class Introduction(Page): pass page_sequence = [Introduction]