import matplotlib.pyplot as plt
import pandas as pd
from matplotlib.animation import FuncAnimation

df = pd.DataFrame(
    {
        "col1": [1, 2, 3, 4],
        "col2": [4, 3, 2, 1],
        "col3": [5, 6, 7, 8],
    }
)

T = df.T.copy()
D = T.to_numpy()
C = T.shift(fill_value=0).cumsum().to_numpy()

plt.style.use("ggplot")

fig, ax = plt.subplots(
    subplot_kw=dict(
        xlim=(-0.5, len(df) - 0.5),
        ylim=(0, df.sum(axis=1).max() + 1),
        xticks=df.index,
    ),
    figsize=(7, 3),
)

def stack(i):
    if i == 0:
        pass # empty frame
    else:
        vals, bot = D[i - 1], C[i - 1]
        ax.bar(df.index, vals, bottom=bot)

ani = FuncAnimation(fig, stack, frames=len(df.columns) + 1)