import simpy


# def generator(n):
#     while True:
#         for j in range(n):
#             yield j
#
# def function(n):
#     for j in range(n):
#         return j


# def main():
#     env = simpy.Environment()
#     env.process(traffic_light(env))
#     env.run(until = 120)
#     print("Simulation complete")
#
# def traffic_light(env):
#     while True:
#         print("Light turned GRN at t =" + str(env.now))
#         yield env.timeout(30)
#         print("Light turned YEL at t =" + str(env.now))
#         yield env.timeout(5)
#         print("Light turned RED at t =" + str(env.now))
#         yield env.timeout(20)
#
# if __import__(name == '_main_'):
#     main()