import matplotlib.pyplot as plt
import matplotlib.animation as ani
import random as rnd


def update(frame):
    participants = rnd.randint(1, 50)
    answers = ["good", "good", "good", "okay", "okay", "bad"]
    for participant in range(participants):
        answer = rnd.choice(answers)
        evals[answer] += 1
    print(evals)
    ax_evals.clear()
    pie_update = ax_evals.pie(
        evals.values(),
        labels=evals.keys()
    )
    return (pie_update,)


evals = {
    "good": 1,
    "okay": 1,
    "bad": 1
}

fig_evals, ax_evals = plt.subplots()
ax_evals.pie(
    evals.values(),
    labels=evals.keys()
)
ax_evals.set(title="Evaluations")

animate = ani.FuncAnimation(fig_evals, update, frames=200, interval=20)
animate.save('animate.gif', writer='pillow')
plt.show()