import numpy as np
import matplotlib.pyplot as plt

# ── Parameters ─────────────────────────────────────────────────────────────
seed      = 1006
size      = 37
colormap  = "plasma"
n_blobs   = 2

# ── Data ────────────────────────────────────────────────────────────────────
x = np.linspace(-3.0, 3.0, size)
y = np.linspace(-2.0, 4.0, size)
X, Y = np.meshgrid(x, y)
Z = np.zeros((size, size))

Z += -1.108660 * np.exp(
    -((X - 0.403428)**2 / (2 * 0.737572**2)
      + (Y - 0.191325)**2 / (2 * 1.299770**2))
)
Z += -1.657798 * np.exp(
    -((X - -0.574257)**2 / (2 * 0.988946**2)
      + (Y - 1.699416)**2 / (2 * 1.362911**2))
)

# ── Plot ────────────────────────────────────────────────────────────────────
fig, ax = plt.subplots(figsize=(6, 5))
im = ax.pcolormesh(X, Y, Z, cmap=colormap, shading="auto")
fig.colorbar(im, ax=ax, label="Intensity")
ax.set_title(f"Gaussian Heatmap  ({n_blobs} blob(s))")
ax.set_xlabel("X")
ax.set_ylabel("Y")
fig.tight_layout()
plt.show()