import turtle as t

alpha = 12
beta = 2*alpha
gamma = 180 - beta

steps = 100
petals = 5

init_angle = 5

for i in range(0, petals):
    start_angle = init_angle + (i * 360 / petals)
    t.setheading(start_angle)
    t.left(alpha)
    t.fd(steps)
    t.right(beta)
    t.fd(steps)
    t.right(gamma)
    t.fd(steps)
    t.right(beta)
    t.fd(steps)

t.done()