loop.py

for x in range(-400,400,100):
    for y in range(-400,400,100):
        box(x,y,80,45)

        

sinewave.py

   
import math

penup()
goto(-500,0)
pendown()
for x in range(-500,500,4):
    y = math.sin(x/50) * 100
    goto(x,y)
    
    
    

turtle-demo.py

from turtle import *

speed(0)
hideturtle()

def box(x=None,y=None,size=100,angle=None):
    penup()
    
    if x is not None or y is not None:
        goto(x,y)

    if angle is not None:
        setheading(angle)

    pendown()

    for i in range(4):
        forward(size)
        left(90)

    penup()



def sweep(x,y,size,start,end,step):
    for angle in range(start, end, step):
        box(x,y,size,angle)


def diamond(x,y,size,step=3):
    sweep(x,y,size,30,60,step)


#diamond(100,100,200,step=1)


# 4 different ways to call box
box()
box(100,100)
box(100,100,200)
box(100,100,200,45)

# more ways to call box with keywords
box(size=300)
box(size=300,angle=30)