chap07_p116_code1.py

import turtle as t 
t.shape("turtle")
t.shapesize(3) 

t.forward( 300 )        
t.right( 90 )
t.forward( 300 )        
t.right( 90 )
t.forward( 300 )        
t.right( 90 )
t.forward( 300 )