To draw a square
import turtle
t=turtle.Turtle()
for i in range(4):
t.forward(200)
t.right(90)
To draw a circle
import turtle
t=turtle.Turtle()
for i in range(360):
t.forward(1)
t.right(1)
To draw a rectangle
import turtle
t=turtle.Turtle()
for i in range(3):
t.forward(200)
t.right(90)
t.forward(80)
t.right(90)