Turtle's random walk - Python

How to let turtle making random movements in the East, North, South, or West in Python?

Rules for Python's Turtle:

1. Each time it moves in a random direction.

2. In each direction it chooses a random color 

3. Each time line's thickness increases

4. Each time it covers the same distance

5. Walks on screen in its fastest mode

Solution:

from turtle import Turtle import random from turtle import Turtle,Screen colours = ["orange","CornflowerBlue", "DarkOrchid", "IndianRed", "DeepSkyBlue", "LightSeaGreen", "wheat", "SlateGray", "SeaGreen"] to_angle=[0,90,180,270] #0 - east, 90 - north, 180 - west & 270 - south tim=Turtle() tim.speed(0) #set to fastest speed mode thickness=0.1 #set to initial thickness 0.1 screen=Screen() screen.setup(420, 420) #non-scrollable screensize for i in range(400): tim.pen(pencolor=random.choice(colours)) #assigns random color tim.pensize(width=thickness) #line;s thickness assigned tim.setheading(random.choice(to_angle)) # Angle/direction(E,N,W & S) tim.forward(20) thickness+=0.07 #line's thickness incremented on each step's end screen.exitonclick()