add Gym

ENV["GYM_ENVS"]="atari:algorithmic:box2d:classic_control"

using Gym

env = GymEnv("CartPole-v0")
reward = 0
episode_count = 10

for i=1:episode_count
    total = 0
    ob = reset!(env)
    render(env)#comment out this line if you do not want to visualize the environment
    while true
        action = sample(env.action_space)
        ob, reward, done, information = step!(env, action)
        total += reward
        render(env)#comment out this line if you do not want to visualize the environment
        done && break
    end
    println("episode $i total Rewards: $total")
end