Sierpinski in a spiral

By Sahaja
# Inspired by "sierpinski" by Anushka Trivedi

def midpoint(a, b):
    """Calculates midpoint between two points a b"""
    return point((a.x+b.x)/2, (a.y+b.y)/2)

def sierpinski(p1, p2, p3, depth):
    if (depth == 0):
        return polygon([p1, p2, p3], fill="black")
    else:    
        mid1 = midpoint(p1, p2)
        mid2 = midpoint(p2, p3)
        mid3 = midpoint(p3, p1)
        return sierpinski(p1, mid1, mid3, depth-1) \
    + sierpinski(p2, mid2, mid1, depth-1) \
    + sierpinski(p3, mid3, mid2, depth-1)

p1 = point(-150, -150)
p2 = point(150, -150)
p3 = point(0, 150)
Sierpinski2 = sierpinski(p1, p2, p3, 5)
shape = Sierpinski2 | scale(0.35) | translate(y=120) | repeat(100, rotate(30) | scale(0.96)) 
show(shape)