v = 0
radius = 50

def setup():
    size(400, 400)

def draw():
    global v
    background(255, 255, 255)

    x = 200 + cos(v)*radius
    y = 200 - sin(v)*radius

    stroke(239, 179, 209)
    line(x, y, 200, 200)
    v = v + 0.01