Answer to the puzzle of a square and 3 angles

turtle-xyz-square-puzzle.py

import turtle, math

def p_line(t, n, length, angle):
    """Draws n line segments."""
    for i in range(n):
        t.fd(length)
        t.lt(angle)

def polygon(t, n, length):
    """Draws a polygon with n sides."""
    angle = 360/n
    p_line(t, n, length, angle)

def move(t, dx, dy):
    t.up()
    x, y = t.pos()
    t.setpos(x + dx, y + dy)
    t.down()

def main():
    window = turtle.Screen() # create a screen
    window.bgcolor("#f5fffa")
    ivy = turtle.Turtle()
    ivy.shape("arrow")
    ivy.color("#EF597B")
    ivy.width(2)
    ivy.speed(20)
    
    ivy.up()
    ivy.goto(-100, -100)
    ivy.down()
    polygon(ivy, 4, 150)
    
    move(ivy, 0, 50)
    ivy.fd(150)
    move(ivy, 0, 50)
    ivy.back(150)
    move(ivy, 50, 50)
    ivy.rt(90)
    ivy.fd(150)
    move(ivy, 50, 0)
    ivy.back(150)

    move(ivy, -50, -50)
    ivy.color("green")
    ivy.setpos(50, 50)
    ivy.color("blue")
    ivy.setpos(0, -100)
    ivy.color("green")
    ivy.setpos(-50, 0)
    ivy.ht()

main()