[Python] Why is my code rendering curves rotated 90 degrees?

I'm trying to make a heating cable layout for floor heating and i got stuck with this problem.

This i what i got from my code


So i made a small program asking for width,lenght of the room and calculating the are in m2. And i need a graphical representation of how cable should be on the floor. This is my code for arch:

# Add C-shaped curves at the end of each section


for i in range(int(width // spacing)):
theta = np.linspace(0, np.pi, 100)
x_curve = length + (spacing / 2) * np.cos(theta)
y_curve = (i + 1) * spacing + (spacing / 2) * np.sin(theta)
color = 'blue' if total_length < 5 else 'red'
ax.plot(x_curve, y_curve, color=color)
total_length += np.pi * (spacing / 2)


I'm a beginner so i tried what i knew so far. If someone can guide me or help me in anyway possible.

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