import numpy as np
import matplotlib
matplotlib.use("Agg")
import matplotlib.pyplot as plt
from pathlib import Path
hours = np.array([2., 3., 4., 5., 6.])
litres = np.array([14., 17., 23., 24., 32.])
target = Path("kiosk-scatter.png")
if target.exists():
    raise FileExistsError(target)
fig, ax = plt.subplots(figsize=(9.6, 5.4), dpi=100)
ax.scatter(hours, litres, color="#0078d4", s=65)
ax.set(xlabel="Planned opening hours (hours)", ylabel="Dispensed amount (litres)", title="Synthetic refill kiosk days")
ax.grid(alpha=0.2)
fig.tight_layout()
fig.savefig(target)
plt.close(fig)
print("Saved kiosk-scatter.png (960 x 540)")