# Plotting Fibonacci | Python

## CodeCatch

### February 12th, 2021 02:28:15 AM

```					# Python program for Plotting Fibonacci
# spiral fractal using Turtle
import turtle
import math

def fiboPlot(n):
a = 0
b = 1
square_a = a
square_b = b

# Setting the colour of the plotting pen to blue
x.pencolor("blue")

# Drawing the first square
x.forward(b * factor)
x.left(90)
x.forward(b * factor)
x.left(90)
x.forward(b * factor)
x.left(90)
x.forward(b * factor)

# Proceeding in the Fibonacci Series
temp = square_b
square_b = square_b + square_a
square_a = temp

# Drawing the rest of the squares
for i in range(1, n):
x.backward(square_a * factor)
x.right(90)
x.forward(square_b * factor)
x.left(90)
x.forward(square_b * factor)
x.left(90)
x.forward(square_b * factor)

# Proceeding in the Fibonacci Series
temp = square_b
square_b = square_b + square_a
square_a = temp

# Bringing the pen to starting point of the spiral plot
x.penup()
x.setposition(factor, 0)
x.seth(0)
x.pendown()

# Setting the colour of the plotting pen to red
x.pencolor("red")

# Fibonacci Spiral Plot
x.left(90)
for i in range(n):
print(b)
fdwd = math.pi * b * factor / 2
fdwd /= 90
for j in range(90):
x.forward(fdwd)
x.left(1)
temp = a
a = b
b = temp + b

# Here 'factor' signifies the multiplicative
# factor which expands or shrinks the scale
# of the plot by a certain factor.
factor = 1

# Taking Input for the number of
# Iterations our Algorithm will run
n = int(input('Enter the number of iterations (must be > 1): '))

# Plotting the Fibonacci Spiral Fractal
# and printing the corresponding Fibonacci Number
if n > 0:
print("Fibonacci series for", n, "elements :")
x = turtle.Turtle()
x.speed(100)
fiboPlot(n)
turtle.done()
else:
print("Number of iterations must be > 0")
```