import matplotlib.pyplot as plt
import numpy as np
 
# Create a figure and axis
fig, ax = plt.subplots()
 
# Set equal aspect so circles look like circles
ax.set_aspect('equal')
 
# Remove axes
ax.axis('off')
 
# Define the rainbow colors (ROYGBIV)
colors = ['red', 'orange', 'yellow', 'green', 'blue', 'indigo', 'violet']
 
# Draw semicircles
for i, color in enumerate(colors):
    radius = 10 - i  # Decreasing radius for inner arcs
    theta = np.linspace(0, np.pi, 100)
    x = radius * np.cos(theta)
    y = radius * np.sin(theta)
    ax.plot(x, y, color=color, linewidth=15)
 
plt.title("🌈 Rainbow Arc with Matplotlib", fontsize=14)
plt.show()
 

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