import turtle, math, random

def funny(t1, t2, n):
    for i in range(n):
        s1 = random.randint(10,20)
        s2 = random.randint(10,20)
        a1 = 45*random.randint(0,7)
        a2 = 45*random.randint(0,7)
        for j in range(4):
            t1.left(a1)
            t2.left(a2)
            t1.forward(s1)
            t2.forward(s2)
            t1.left(90)
            t2.left(90)
    return

#--------
t1 = turtle.Turtle()
t1.color("blue")
t2 = turtle.Turtle()
t2.color("red")
funny(t1,t2,20)